123742013 has 8 divisors (see below), whose sum is σ = 124679520. Its totient is φ = 122808400.

The previous prime is 123742009. The next prime is 123742039. The reversal of 123742013 is 310247321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123742013 - 2² = 123742009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123742013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123742063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94463 + ... + 95763.

It is an arithmetic number, because the mean of its divisors is an integer number (15584940).

Almost surely, 2^123742013 is an apocalyptic number.

It is an amenable number.

123742013 is a deficient number, since it is larger than the sum of its proper divisors (937507).

123742013 is a wasteful number, since it uses less digits than its factorization.

123742013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 123742013 is about 11123.9387358975. The cubic root of 123742013 is about 498.3170255498.

Adding to 123742013 its reverse (310247321), we get a palindrome (433989334).

The spelling of 123742013 in words is "one hundred twenty-three million, seven hundred forty-two thousand, thirteen".