126400531 has 8 divisors (see below), whose sum is σ = 133542720. Its totient is φ = 119443968.

The previous prime is 126400523. The next prime is 126400541. The reversal of 126400531 is 135004621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126400531 - 2³ = 126400523 is a prime.

It is a super-2 number, since 2×126400531² = 31954188474163922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126400501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45006 + ... + 47731.

It is an arithmetic number, because the mean of its divisors is an integer number (16692840).

Almost surely, 2^126400531 is an apocalyptic number.

126400531 is a deficient number, since it is larger than the sum of its proper divisors (7142189).

126400531 is an equidigital number, since it uses as much as digits as its factorization.

126400531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92813.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 126400531 is about 11242.7990731846. The cubic root of 126400531 is about 501.8604435801.

The spelling of 126400531 in words is "one hundred twenty-six million, four hundred thousand, five hundred thirty-one".