124643531 has 2 divisors, whose sum is σ = 124643532. Its totient is φ = 124643530.

The previous prime is 124643503. The next prime is 124643539. The reversal of 124643531 is 135346421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 124643531 - 2¹⁴ = 124627147 is a prime.

It is a super-2 number, since 2×124643531² = 31072019640295922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 124643494 and 124643503.

It is not a weakly prime, because it can be changed into another prime (124643539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62321765 + 62321766.

It is an arithmetic number, because the mean of its divisors is an integer number (62321766).

Almost surely, 2^124643531 is an apocalyptic number.

124643531 is a deficient number, since it is larger than the sum of its proper divisors (1).

124643531 is an equidigital number, since it uses as much as digits as its factorization.

124643531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

The square root of 124643531 is about 11164.3867274472. The cubic root of 124643531 is about 499.5242554779.

Adding to 124643531 its reverse (135346421), we get a palindrome (259989952).

The spelling of 124643531 in words is "one hundred twenty-four million, six hundred forty-three thousand, five hundred thirty-one".