124722919 has 4 divisors (see below), whose sum is σ = 127623496. Its totient is φ = 121822344.

The previous prime is 124722907. The next prime is 124722947. The reversal of 124722919 is 919227421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 124722919 - 2⁵ = 124722887 is a prime.

It is a super-2 number, since 2×124722919² = 31111613047761122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124722989) 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 in 3 ways as a sum of consecutive naturals, for example, 1450224 + ... + 1450309.

It is an arithmetic number, because the mean of its divisors is an integer number (31905874).

Almost surely, 2^124722919 is an apocalyptic number.

124722919 is a deficient number, since it is larger than the sum of its proper divisors (2900577).

124722919 is an equidigital number, since it uses as much as digits as its factorization.

124722919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900576.

The product of its digits is 18144, while the sum is 37.

The square root of 124722919 is about 11167.9415739876. The cubic root of 124722919 is about 499.6302853562.

The spelling of 124722919 in words is "one hundred twenty-four million, seven hundred twenty-two thousand, nine hundred nineteen".