1257296481 has 72 divisors (see below), whose sum is σ = 2259591360. Its totient is φ = 658082880.

The previous prime is 1257296459. The next prime is 1257296507. The reversal of 1257296481 is 1846927521.

1257296481 is a `hidden beast` number, since 12 + 5 + 72 + 96 + 481 = 666.

It is not a de Polignac number, because 1257296481 - 2¹⁴ = 1257280097 is a prime.

It is a super-2 number, since 2×1257296481² = 3161588882269966722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1257296281) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1149771 + ... + 1150863.

Almost surely, 2^1257296481 is an apocalyptic number.

It is an amenable number.

1257296481 is a deficient number, since it is larger than the sum of its proper divisors (1002294879).

1257296481 is a wasteful number, since it uses less digits than its factorization.

1257296481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187 (or 1153 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 1257296481 is about 35458.3767394956. The cubic root of 1257296481 is about 1079.3092522349.

The spelling of 1257296481 in words is "one billion, two hundred fifty-seven million, two hundred ninety-six thousand, four hundred eighty-one".