1249306457 has 16 divisors (see below), whose sum is σ = 1480162560. Its totient is φ = 1031704128.

The previous prime is 1249306453. The next prime is 1249306469. The reversal of 1249306457 is 7546039421.

It is not a de Polignac number, because 1249306457 - 2² = 1249306453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249306453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92543 + ... + 105179.

It is an arithmetic number, because the mean of its divisors is an integer number (92510160).

Almost surely, 2^1249306457 is an apocalyptic number.

It is an amenable number.

1249306457 is a deficient number, since it is larger than the sum of its proper divisors (230856103).

1249306457 is a wasteful number, since it uses less digits than its factorization.

1249306457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13160.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 1249306457 is about 35345.5295193041. The cubic root of 1249306457 is about 1077.0180824124.

The spelling of 1249306457 in words is "one billion, two hundred forty-nine million, three hundred six thousand, four hundred fifty-seven".