124145531 has 2 divisors, whose sum is σ = 124145532. Its totient is φ = 124145530.

The previous prime is 124145521. The next prime is 124145537. The reversal of 124145531 is 135541421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 124145531 - 2²⁶ = 57036667 is a prime.

It is a super-2 number, since 2×124145531² = 30824225734543922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 124145531.

It is not a weakly prime, because it can be changed into another prime (124145537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62072765 + 62072766.

It is an arithmetic number, because the mean of its divisors is an integer number (62072766).

Almost surely, 2^124145531 is an apocalyptic number.

124145531 is a deficient number, since it is larger than the sum of its proper divisors (1).

124145531 is an equidigital number, since it uses as much as digits as its factorization.

124145531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 124145531 is about 11142.0613442935. The cubic root of 124145531 is about 498.8581021238.

Adding to 124145531 its reverse (135541421), we get a palindrome (259686952).

The spelling of 124145531 in words is "one hundred twenty-four million, one hundred forty-five thousand, five hundred thirty-one".