1245904 has 20 divisors (see below), whose sum is σ = 2633760. Its totient is φ = 566240.

The previous prime is 1245883. The next prime is 1245917. The reversal of 1245904 is 4095421.

1245904 = 63² + 64² + ... + 158².

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3364 + ... + 3715.

It is an arithmetic number, because the mean of its divisors is an integer number (131688).

2^1245904 is an apocalyptic number.

It is an amenable number.

1245904 is an abundant number, since it is smaller than the sum of its proper divisors (1387856).

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

1245904 is a wasteful number, since it uses less digits than its factorization.

1245904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7098 (or 7092 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1245904 is about 1116.2006987993. The cubic root of 1245904 is about 107.6039448902.

The spelling of 1245904 in words is "one million, two hundred forty-five thousand, nine hundred four".