126031431 has 4 divisors (see below), whose sum is σ = 168041912. Its totient is φ = 84020952.

The previous prime is 126031379. The next prime is 126031447. The reversal of 126031431 is 134130621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 126031431 - 2¹¹ = 126029383 is a prime.

It is a super-2 number, since 2×126031431² = 31767843199815522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126031398 and 126031407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126031481) 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, 21005236 + ... + 21005241.

It is an arithmetic number, because the mean of its divisors is an integer number (42010478).

Almost surely, 2^126031431 is an apocalyptic number.

126031431 is a deficient number, since it is larger than the sum of its proper divisors (42010481).

126031431 is an equidigital number, since it uses as much as digits as its factorization.

126031431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42010480.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 126031431 is about 11226.3721210371. The cubic root of 126031431 is about 501.3714760009.

The spelling of 126031431 in words is "one hundred twenty-six million, thirty-one thousand, four hundred thirty-one".