1257925 has 12 divisors (see below), whose sum is σ = 1585216. Its totient is φ = 990000.

The previous prime is 1257911. The next prime is 1257931. The reversal of 1257925 is 5297521.

It is not a de Polignac number, because 1257925 - 2¹³ = 1249733 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1300 + ... + 2050.

2^1257925 is an apocalyptic number.

It is an amenable number.

1257925 is a deficient number, since it is larger than the sum of its proper divisors (327291).

1257925 is an equidigital number, since it uses as much as digits as its factorization.

1257925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828 (or 823 counting only the distinct ones).

The product of its digits is 6300, while the sum is 31.

The square root of 1257925 is about 1121.5725567256. The cubic root of 1257925 is about 107.9489070169.

The spelling of 1257925 in words is "one million, two hundred fifty-seven thousand, nine hundred twenty-five".