124375981 has 4 divisors (see below), whose sum is σ = 127737532. Its totient is φ = 121014432.

The previous prime is 124375967. The next prime is 124375991. The reversal of 124375981 is 189573421.

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 64561225 + 59814756 = 8035^2 + 7734^2 .

It is a cyclic number.

It is not a de Polignac number, because 124375981 - 2¹¹ = 124373933 is a prime.

It is a super-2 number, since 2×124375981² = 30938769299424722, 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 (124375991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1680720 + ... + 1680793.

It is an arithmetic number, because the mean of its divisors is an integer number (31934383).

Almost surely, 2^124375981 is an apocalyptic number.

It is an amenable number.

124375981 is a deficient number, since it is larger than the sum of its proper divisors (3361551).

124375981 is an equidigital number, since it uses as much as digits as its factorization.

124375981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361550.

The product of its digits is 60480, while the sum is 40.

The square root of 124375981 is about 11152.3979932569. The cubic root of 124375981 is about 499.1665862816.

The spelling of 124375981 in words is "one hundred twenty-four million, three hundred seventy-five thousand, nine hundred eighty-one".