124345621 has 2 divisors, whose sum is σ = 124345622. Its totient is φ = 124345620.

The previous prime is 124345609. The next prime is 124345643. The reversal of 124345621 is 126543421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83064996 + 41280625 = 9114^2 + 6425^2 .

It is a cyclic number.

It is not a de Polignac number, because 124345621 - 2¹³ = 124337429 is a prime.

It is a Chen prime.

It is equal to p_7075090 and since 124345621 and 7075090 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 124345621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124345601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62172810 + 62172811.

It is an arithmetic number, because the mean of its divisors is an integer number (62172811).

Almost surely, 2^124345621 is an apocalyptic number.

It is an amenable number.

124345621 is a deficient number, since it is larger than the sum of its proper divisors (1).

124345621 is an equidigital number, since it uses as much as digits as its factorization.

124345621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

The square root of 124345621 is about 11151.0367679423. The cubic root of 124345621 is about 499.1259676920.

It can be divided in two parts, 1243 and 45621, that added together give a palindrome (46864).

The spelling of 124345621 in words is "one hundred twenty-four million, three hundred forty-five thousand, six hundred twenty-one".