124961909 has 4 divisors (see below), whose sum is σ = 125090016. Its totient is φ = 124833804.

The previous prime is 124961897. The next prime is 124961929. The reversal of 124961909 is 909169421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 909169421 = 23497 ⋅38693.

It is a cyclic number.

It is not a de Polignac number, because 124961909 - 2²⁴ = 108184693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124961929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62579 + ... + 64544.

It is an arithmetic number, because the mean of its divisors is an integer number (31272504).

Almost surely, 2^124961909 is an apocalyptic number.

It is an amenable number.

124961909 is a deficient number, since it is larger than the sum of its proper divisors (128107).

124961909 is an equidigital number, since it uses as much as digits as its factorization.

124961909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128106.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 124961909 is about 11178.6362763979. The cubic root of 124961909 is about 499.9492068403.

The spelling of 124961909 in words is "one hundred twenty-four million, nine hundred sixty-one thousand, nine hundred nine".