126432621 has 24 divisors (see below), whose sum is σ = 220993344. Its totient is φ = 67996800.

The previous prime is 126432619. The next prime is 126432623. The reversal of 126432621 is 126234621.

126432621 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 32 + 621 = 666.

It is an interprime number because it is at equal distance from previous prime (126432619) and next prime (126432623).

It is not a de Polignac number, because 126432621 - 2¹ = 126432619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126432623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57955 + ... + 60096.

It is an arithmetic number, because the mean of its divisors is an integer number (9208056).

Almost surely, 2^126432621 is an apocalyptic number.

It is an amenable number.

126432621 is a deficient number, since it is larger than the sum of its proper divisors (94560723).

126432621 is a wasteful number, since it uses less digits than its factorization.

126432621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118081 (or 118078 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 126432621 is about 11244.2261183240. The cubic root of 126432621 is about 501.9029100129.

The spelling of 126432621 in words is "one hundred twenty-six million, four hundred thirty-two thousand, six hundred twenty-one".