126423561 has 32 divisors (see below), whose sum is σ = 192964608. Its totient is φ = 72930240.

The previous prime is 126423533. The next prime is 126423593. The reversal of 126423561 is 165324621.

It is not a de Polignac number, because 126423561 - 2⁵ = 126423529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126423061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56286 + ... + 58488.

It is an arithmetic number, because the mean of its divisors is an integer number (6030144).

Almost surely, 2^126423561 is an apocalyptic number.

126423561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126423561 is a deficient number, since it is larger than the sum of its proper divisors (66541047).

126423561 is a wasteful number, since it uses less digits than its factorization.

126423561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301.

The product of its digits is 8640, while the sum is 30.

The square root of 126423561 is about 11243.8232376714. The cubic root of 126423561 is about 501.8909211529.

The spelling of 126423561 in words is "one hundred twenty-six million, four hundred twenty-three thousand, five hundred sixty-one".