126615131 has 4 divisors (see below), whose sum is σ = 130981200. Its totient is φ = 122249064.

The previous prime is 126615103. The next prime is 126615157. The reversal of 126615131 is 131516621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126615131 - 2¹⁰ = 126614107 is a prime.

It is a super-2 number, since 2×126615131² = 32062782796294322, which contains 22 as substring.

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 126615131.

It is not an unprimeable number, because it can be changed into a prime (126615101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2182991 + ... + 2183048.

It is an arithmetic number, because the mean of its divisors is an integer number (32745300).

Almost surely, 2^126615131 is an apocalyptic number.

126615131 is a deficient number, since it is larger than the sum of its proper divisors (4366069).

126615131 is an equidigital number, since it uses as much as digits as its factorization.

126615131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366068.

The product of its digits is 1080, while the sum is 26.

The square root of 126615131 is about 11252.3389124217. The cubic root of 126615131 is about 502.1442988191.

The spelling of 126615131 in words is "one hundred twenty-six million, six hundred fifteen thousand, one hundred thirty-one".