124288013 has 4 divisors (see below), whose sum is σ = 125428380. Its totient is φ = 123147648.

The previous prime is 124288007. The next prime is 124288033. The reversal of 124288013 is 310882421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310882421 = 23 ⋅13516627.

It can be written as a sum of positive squares in 2 ways, for example, as 49603849 + 74684164 = 7043^2 + 8642^2 .

It is a cyclic number.

It is not a de Polignac number, because 124288013 - 2¹² = 124283917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124288033) 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, 570020 + ... + 570237.

It is an arithmetic number, because the mean of its divisors is an integer number (31357095).

Almost surely, 2^124288013 is an apocalyptic number.

It is an amenable number.

124288013 is a deficient number, since it is larger than the sum of its proper divisors (1140367).

124288013 is a wasteful number, since it uses less digits than its factorization.

124288013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140366.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 124288013 is about 11148.4533904932. The cubic root of 124288013 is about 499.0488758730.

The spelling of 124288013 in words is "one hundred twenty-four million, two hundred eighty-eight thousand, thirteen".