124392985 has 4 divisors (see below), whose sum is σ = 149271588. Its totient is φ = 99514384.

The previous prime is 124392967. The next prime is 124392991. The reversal of 124392985 is 589293421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64979721 + 59413264 = 8061^2 + 7708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124392985 is a prime.

It is a super-2 number, since 2×124392985² = 30947229434420450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 12439294 + ... + 12439303.

It is an arithmetic number, because the mean of its divisors is an integer number (37317897).

Almost surely, 2^124392985 is an apocalyptic number.

It is an amenable number.

124392985 is a deficient number, since it is larger than the sum of its proper divisors (24878603).

124392985 is an equidigital number, since it uses as much as digits as its factorization.

124392985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24878602.

The product of its digits is 155520, while the sum is 43.

The square root of 124392985 is about 11153.1603144580. The cubic root of 124392985 is about 499.1893330151.

The spelling of 124392985 in words is "one hundred twenty-four million, three hundred ninety-two thousand, nine hundred eighty-five".