124643381 has 2 divisors, whose sum is σ = 124643382. Its totient is φ = 124643380.

The previous prime is 124643347. The next prime is 124643437. The reversal of 124643381 is 183346421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98684356 + 25959025 = 9934^2 + 5095^2 .

It is a cyclic number.

It is not a de Polignac number, because 124643381 - 2⁶ = 124643317 is a prime.

It is a super-2 number, since 2×124643381² = 31071944854222322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124643581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62321690 + 62321691.

It is an arithmetic number, because the mean of its divisors is an integer number (62321691).

Almost surely, 2^124643381 is an apocalyptic number.

It is an amenable number.

124643381 is a deficient number, since it is larger than the sum of its proper divisors (1).

124643381 is an equidigital number, since it uses as much as digits as its factorization.

124643381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The square root of 124643381 is about 11164.3800096557. The cubic root of 124643381 is about 499.5240550966.

The spelling of 124643381 in words is "one hundred twenty-four million, six hundred forty-three thousand, three hundred eighty-one".