1257346925 has 12 divisors (see below), whose sum is σ = 1559929920. Its totient is φ = 1005348720.

The previous prime is 1257346901. The next prime is 1257346927. The reversal of 1257346925 is 5296437521.

It is not a de Polignac number, because 1257346925 - 2⁸ = 1257346669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257346927) 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, 39386 + ... + 63764.

It is an arithmetic number, because the mean of its divisors is an integer number (129994160).

Almost surely, 2^1257346925 is an apocalyptic number.

It is an amenable number.

1257346925 is a deficient number, since it is larger than the sum of its proper divisors (302582995).

1257346925 is a wasteful number, since it uses less digits than its factorization.

1257346925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26452 (or 26447 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The square root of 1257346925 is about 35459.0880452388. The cubic root of 1257346925 is about 1079.3236863663.

The spelling of 1257346925 in words is "one billion, two hundred fifty-seven million, three hundred forty-six thousand, nine hundred twenty-five".