124940609 has 4 divisors (see below), whose sum is σ = 125064240. Its totient is φ = 124816980.

The previous prime is 124940593. The next prime is 124940639. The reversal of 124940609 is 906049421.

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: 906049421 = 6263 ⋅144667.

It is a cyclic number.

It is not a de Polignac number, because 124940609 - 2⁴ = 124940593 is a prime.

It is a super-2 number, since 2×124940609² = 31220311554581762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124940639) 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 in 3 ways as a sum of consecutive naturals, for example, 60287 + ... + 62324.

It is an arithmetic number, because the mean of its divisors is an integer number (31266060).

Almost surely, 2^124940609 is an apocalyptic number.

It is an amenable number.

124940609 is a deficient number, since it is larger than the sum of its proper divisors (123631).

124940609 is a wasteful number, since it uses less digits than its factorization.

124940609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123630.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 124940609 is about 11177.6835256685. The cubic root of 124940609 is about 499.9207994552.

The spelling of 124940609 in words is "one hundred twenty-four million, nine hundred forty thousand, six hundred nine".