1257344468 has 12 divisors (see below), whose sum is σ = 2210221440. Its totient is φ = 625852632.

The previous prime is 1257344461. The next prime is 1257344483. The reversal of 1257344468 is 8644437521.

It is a happy number.

It is a super-2 number, since 2×1257344468² = 3161830222420406048, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257344461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703898 + ... + 705681.

It is an arithmetic number, because the mean of its divisors is an integer number (184185120).

Almost surely, 2^1257344468 is an apocalyptic number.

It is an amenable number.

1257344468 is a deficient number, since it is larger than the sum of its proper divisors (952876972).

1257344468 is a wasteful number, since it uses less digits than its factorization.

1257344468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409806 (or 1409804 counting only the distinct ones).

The product of its digits is 645120, while the sum is 44.

The square root of 1257344468 is about 35459.0533996609. The cubic root of 1257344468 is about 1079.3229833251.

The spelling of 1257344468 in words is "one billion, two hundred fifty-seven million, three hundred forty-four thousand, four hundred sixty-eight".