1257172 has 24 divisors (see below), whose sum is σ = 2560320. Its totient is φ = 528960.

The previous prime is 1257163. The next prime is 1257199. The reversal of 1257172 is 2717521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1272 + ... + 2032.

It is an arithmetic number, because the mean of its divisors is an integer number (106680).

2^1257172 is an apocalyptic number.

It is an amenable number.

1257172 is an abundant number, since it is smaller than the sum of its proper divisors (1303148).

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

1257172 is a wasteful number, since it uses less digits than its factorization.

1257172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 829 counting only the distinct ones).

The product of its digits is 980, while the sum is 25.

The square root of 1257172 is about 1121.2368170908. The cubic root of 1257172 is about 107.9273631379.

The spelling of 1257172 in words is "one million, two hundred fifty-seven thousand, one hundred seventy-two".