1257171025 has 24 divisors (see below), whose sum is σ = 1759262400. Its totient is φ = 882772800.

The previous prime is 1257170983. The next prime is 1257171031. The reversal of 1257171025 is 5201717521.

It is not a de Polignac number, because 1257171025 - 2¹¹ = 1257168977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70845 + ... + 86794.

It is an arithmetic number, because the mean of its divisors is an integer number (73302600).

Almost surely, 2^1257171025 is an apocalyptic number.

It is an amenable number.

1257171025 is a deficient number, since it is larger than the sum of its proper divisors (502091375).

1257171025 is a wasteful number, since it uses less digits than its factorization.

1257171025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157689 (or 157684 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 31.

The square root of 1257171025 is about 35456.6076352490. The cubic root of 1257171025 is about 1079.2733523689.

Adding to 1257171025 its reverse (5201717521), we get a palindrome (6458888546).

The spelling of 1257171025 in words is "one billion, two hundred fifty-seven million, one hundred seventy-one thousand, twenty-five".