124989421 has 2 divisors, whose sum is σ = 124989422. Its totient is φ = 124989420.

The previous prime is 124989409. The next prime is 124989461.

124989421 is nontrivially palindromic in base 10.

It is an a-pointer prime, because the next prime (124989461) can be obtained adding 124989421 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70392100 + 54597321 = 8390^2 + 7389^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124989421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124989461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62494710 + 62494711.

It is an arithmetic number, because the mean of its divisors is an integer number (62494711).

Almost surely, 2^124989421 is an apocalyptic number.

It is an amenable number.

124989421 is a deficient number, since it is larger than the sum of its proper divisors (1).

124989421 is an equidigital number, since it uses as much as digits as its factorization.

124989421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The square root of 124989421 is about 11179.8667702258. The cubic root of 124989421 is about 499.9858942687.

The spelling of 124989421 in words is "one hundred twenty-four million, nine hundred eighty-nine thousand, four hundred twenty-one".