1422240 has 48 divisors (see below), whose sum is σ = 4481568. Its totient is φ = 379136.

The previous prime is 1422229. The next prime is 1422241. The reversal of 1422240 is 422241.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1422241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1002 + ... + 1961.

It is an arithmetic number, because the mean of its divisors is an integer number (93366).

2^1422240 is an apocalyptic number.

1422240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1422240 is an abundant number, since it is smaller than the sum of its proper divisors (3059328).

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

1422240 is a wasteful number, since it uses less digits than its factorization.

1422240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981 (or 2973 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1422240 is about 1192.5770415365. The cubic root of 1422240 is about 112.4581572787.

Adding to 1422240 its reverse (422241), we get a palindrome (1844481).

Subtracting from 1422240 its reverse (422241), we obtain a palindrome (999999).

The spelling of 1422240 in words is "one million, four hundred twenty-two thousand, two hundred forty".