1257948670 has 48 divisors (see below), whose sum is σ = 2493915984. Its totient is φ = 456508800.

The previous prime is 1257948577. The next prime is 1257948673. The reversal of 1257948670 is 768497521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257948673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 951610 + ... + 952930.

It is an arithmetic number, because the mean of its divisors is an integer number (51956583).

Almost surely, 2^1257948670 is an apocalyptic number.

1257948670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1257948670 is a deficient number, since it is larger than the sum of its proper divisors (1235967314).

1257948670 is a wasteful number, since it uses less digits than its factorization.

1257948670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137 (or 2126 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 49.

The square root of 1257948670 is about 35467.5720905731. The cubic root of 1257948670 is about 1079.4958409341.

The spelling of 1257948670 in words is "one billion, two hundred fifty-seven million, nine hundred forty-eight thousand, six hundred seventy".