1625904 has 60 divisors (see below), whose sum is σ = 5203536. Its totient is φ = 464256.

The previous prime is 1625903. The next prime is 1625909. The reversal of 1625904 is 4095261.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1625903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202 + ... + 1814.

2^1625904 is an apocalyptic number.

1625904 is a gapful number since it is divisible by the number (14) 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 1625904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2601768).

1625904 is an abundant number, since it is smaller than the sum of its proper divisors (3577632).

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

1625904 is a wasteful number, since it uses less digits than its factorization.

1625904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1625904 is about 1275.1094070706. The cubic root of 1625904 is about 117.5885314375.

The spelling of 1625904 in words is "one million, six hundred twenty-five thousand, nine hundred four".