124520861 has 2 divisors, whose sum is σ = 124520862. Its totient is φ = 124520860.

The previous prime is 124520843. The next prime is 124520863. The reversal of 124520861 is 168025421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101384761 + 23136100 = 10069^2 + 4810^2 .

It is a cyclic number.

It is not a de Polignac number, because 124520861 - 2²⁶ = 57411997 is a prime.

Together with 124520863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124520863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62260430 + 62260431.

It is an arithmetic number, because the mean of its divisors is an integer number (62260431).

Almost surely, 2^124520861 is an apocalyptic number.

It is an amenable number.

124520861 is a deficient number, since it is larger than the sum of its proper divisors (1).

124520861 is an equidigital number, since it uses as much as digits as its factorization.

124520861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 124520861 is about 11158.8915668179. The cubic root of 124520861 is about 499.3603299936.

The spelling of 124520861 in words is "one hundred twenty-four million, five hundred twenty thousand, eight hundred sixty-one".