126310531 has 4 divisors (see below), whose sum is σ = 126522000. Its totient is φ = 126099064.

The previous prime is 126310529. The next prime is 126310543. The reversal of 126310531 is 135013621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135013621 = 97 ⋅1391893.

It is a cyclic number.

It is not a de Polignac number, because 126310531 - 2¹ = 126310529 is a prime.

It is a super-2 number, since 2×126310531² = 31908700483003922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126310511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104836 + ... + 106033.

It is an arithmetic number, because the mean of its divisors is an integer number (31630500).

Almost surely, 2^126310531 is an apocalyptic number.

126310531 is a deficient number, since it is larger than the sum of its proper divisors (211469).

126310531 is an equidigital number, since it uses as much as digits as its factorization.

126310531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211468.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 126310531 is about 11238.7957984830. The cubic root of 126310531 is about 501.7413033521.

The spelling of 126310531 in words is "one hundred twenty-six million, three hundred ten thousand, five hundred thirty-one".