1257472256215 has 16 divisors (see below), whose sum is σ = 1724759382528. Its totient is φ = 862153688736.

The previous prime is 1257472256113. The next prime is 1257472256291. The reversal of 1257472256215 is 5126522747521.

It is a cyclic number.

It is not a de Polignac number, because 1257472256215 - 2¹¹ = 1257472254167 is a prime.

It is a super-2 number, since 2×1257472256215² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2082867 + ... + 2617876.

It is an arithmetic number, because the mean of its divisors is an integer number (107797461408).

Almost surely, 2^{1257472256215} is an apocalyptic number.

1257472256215 is a deficient number, since it is larger than the sum of its proper divisors (467287126313).

1257472256215 is an equidigital number, since it uses as much as digits as its factorization.

1257472256215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708398.

The product of its digits is 2352000, while the sum is 49.

The spelling of 1257472256215 in words is "one trillion, two hundred fifty-seven billion, four hundred seventy-two million, two hundred fifty-six thousand, two hundred fifteen".