124972609 has 4 divisors (see below), whose sum is σ = 125670960. Its totient is φ = 124274260.

The previous prime is 124972553. The next prime is 124972619. The reversal of 124972609 is 906279421.

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: 906279421 = 2687 ⋅337283.

It is a cyclic number.

It is not a de Polignac number, because 124972609 - 2¹¹ = 124970561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124972619) 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, 348907 + ... + 349264.

It is an arithmetic number, because the mean of its divisors is an integer number (31417740).

Almost surely, 2^124972609 is an apocalyptic number.

It is an amenable number.

124972609 is a deficient number, since it is larger than the sum of its proper divisors (698351).

124972609 is an equidigital number, since it uses as much as digits as its factorization.

124972609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698350.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 124972609 is about 11179.1148576263. The cubic root of 124972609 is about 499.9634759987.

The spelling of 124972609 in words is "one hundred twenty-four million, nine hundred seventy-two thousand, six hundred nine".