124921001 has 2 divisors, whose sum is σ = 124921002. Its totient is φ = 124921000.

The previous prime is 124920989. The next prime is 124921003. The reversal of 124921001 is 100129421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111408025 + 13512976 = 10555^2 + 3676^2 .

It is a cyclic number.

It is not a de Polignac number, because 124921001 - 2⁶ = 124920937 is a prime.

Together with 124921003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (124921003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62460500 + 62460501.

It is an arithmetic number, because the mean of its divisors is an integer number (62460501).

Almost surely, 2^124921001 is an apocalyptic number.

It is an amenable number.

124921001 is a deficient number, since it is larger than the sum of its proper divisors (1).

124921001 is an equidigital number, since it uses as much as digits as its factorization.

124921001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 124921001 is about 11176.8063864415. The cubic root of 124921001 is about 499.8946458025.

The spelling of 124921001 in words is "one hundred twenty-four million, nine hundred twenty-one thousand, one".