1442540 has 48 divisors (see below), whose sum is σ = 3386880. Its totient is φ = 511680.

The previous prime is 1442531. The next prime is 1442549. The reversal of 1442540 is 452441.

It is an interprime number because it is at equal distance from previous prime (1442531) and next prime (1442549).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17339 + ... + 17421.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2^1442540 is an apocalyptic number.

1442540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1442540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693440).

1442540 is an abundant number, since it is smaller than the sum of its proper divisors (1944340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1442540 is a wasteful number, since it uses less digits than its factorization.

1442540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1442540 is about 1201.0578670489. The cubic root of 1442540 is about 112.9906797858.

1442540 divided by its sum of digits (20) gives a palindrome (72127).

Adding to 1442540 its reverse (452441), we get a palindrome (1894981).

Subtracting from 1442540 its reverse (452441), we obtain a palindrome (990099).

The spelling of 1442540 in words is "one million, four hundred forty-two thousand, five hundred forty".