1425440 has 48 divisors (see below), whose sum is σ = 3447360. Its totient is φ = 556800.

The previous prime is 1425439. The next prime is 1425451. The reversal of 1425440 is 445241.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9365 + ... + 9515.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2^1425440 is an apocalyptic number.

1425440 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 1425440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1723680).

1425440 is an abundant number, since it is smaller than the sum of its proper divisors (2021920).

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

1425440 is a wasteful number, since it uses less digits than its factorization.

1425440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 217 counting only the distinct ones).

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

The square root of 1425440 is about 1193.9179201268. The cubic root of 1425440 is about 112.5424366651.

The spelling of 1425440 in words is "one million, four hundred twenty-five thousand, four hundred forty".