1257081875 has 20 divisors (see below), whose sum is σ = 1795262832. Its totient is φ = 861996000.

The previous prime is 1257081871. The next prime is 1257081883. The reversal of 1257081875 is 5781807521.

It is not a de Polignac number, because 1257081875 - 2² = 1257081871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257081871) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 139292 + ... + 148041.

Almost surely, 2^1257081875 is an apocalyptic number.

1257081875 is a deficient number, since it is larger than the sum of its proper divisors (538180957).

1257081875 is an frugal number, since it uses more digits than its factorization.

1257081875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287360 (or 287345 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 44.

The square root of 1257081875 is about 35455.3504424932. The cubic root of 1257081875 is about 1079.2478401960.

The spelling of 1257081875 in words is "one billion, two hundred fifty-seven million, eighty-one thousand, eight hundred seventy-five".