124390381 has 2 divisors, whose sum is σ = 124390382. Its totient is φ = 124390380.

The previous prime is 124390361. The next prime is 124390403. The reversal of 124390381 is 183093421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76212900 + 48177481 = 8730^2 + 6941^2 .

It is a cyclic number.

It is not a de Polignac number, because 124390381 - 2⁹ = 124389869 is a prime.

It is a super-2 number, since 2×124390381² = 30945933770650322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124390361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62195190 + 62195191.

It is an arithmetic number, because the mean of its divisors is an integer number (62195191).

Almost surely, 2^124390381 is an apocalyptic number.

It is an amenable number.

124390381 is a deficient number, since it is larger than the sum of its proper divisors (1).

124390381 is an equidigital number, since it uses as much as digits as its factorization.

124390381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 124390381 is about 11153.0435756344. The cubic root of 124390381 is about 499.1858497048.

The spelling of 124390381 in words is "one hundred twenty-four million, three hundred ninety thousand, three hundred eighty-one".