126031621 has 4 divisors (see below), whose sum is σ = 126179200. Its totient is φ = 125884044.

The previous prime is 126031613. The next prime is 126031627. The reversal of 126031621 is 126130621.

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.

It is a cyclic number.

It is not a de Polignac number, because 126031621 - 2³ = 126031613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126031592 and 126031601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126031627) 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, 72501 + ... + 74218.

It is an arithmetic number, because the mean of its divisors is an integer number (31544800).

Almost surely, 2^126031621 is an apocalyptic number.

It is an amenable number.

126031621 is a deficient number, since it is larger than the sum of its proper divisors (147579).

126031621 is an equidigital number, since it uses as much as digits as its factorization.

126031621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147578.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 126031621 is about 11226.3805832512. The cubic root of 126031621 is about 501.3717279501.

The spelling of 126031621 in words is "one hundred twenty-six million, thirty-one thousand, six hundred twenty-one".