127256513 has 4 divisors (see below), whose sum is σ = 128789808. Its totient is φ = 125723220.

The previous prime is 127256501. The next prime is 127256533. The reversal of 127256513 is 315652721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315652721 = 5717 ⋅55213.

It is a cyclic number.

It is not a de Polignac number, because 127256513 - 2⁶ = 127256449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127256513.

It is not an unprimeable number, because it can be changed into a prime (127256533) 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, 766523 + ... + 766688.

It is an arithmetic number, because the mean of its divisors is an integer number (32197452).

Almost surely, 2^127256513 is an apocalyptic number.

It is an amenable number.

127256513 is a deficient number, since it is larger than the sum of its proper divisors (1533295).

127256513 is an equidigital number, since it uses as much as digits as its factorization.

127256513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533294.

The product of its digits is 12600, while the sum is 32.

The square root of 127256513 is about 11280.8028526342. The cubic root of 127256513 is about 502.9907590522.

The spelling of 127256513 in words is "one hundred twenty-seven million, two hundred fifty-six thousand, five hundred thirteen".