124128031 has 2 divisors, whose sum is σ = 124128032. Its totient is φ = 124128030.

The previous prime is 124128023. The next prime is 124128047. The reversal of 124128031 is 130821421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 124128031 - 2³ = 124128023 is a prime.

It is a super-2 number, since 2×124128031² = 30815536159873922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 124127993 and 124128011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124128131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62064015 + 62064016.

It is an arithmetic number, because the mean of its divisors is an integer number (62064016).

Almost surely, 2^124128031 is an apocalyptic number.

124128031 is a deficient number, since it is larger than the sum of its proper divisors (1).

124128031 is an equidigital number, since it uses as much as digits as its factorization.

124128031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 124128031 is about 11141.2760041209. The cubic root of 124128031 is about 498.8346607456.

Adding to 124128031 its reverse (130821421), we get a palindrome (254949452).

The spelling of 124128031 in words is "one hundred twenty-four million, one hundred twenty-eight thousand, thirty-one".