123157513 has 8 divisors (see below), whose sum is σ = 127483136. Its totient is φ = 118854000.

The previous prime is 123157511. The next prime is 123157553. The reversal of 123157513 is 315751321.

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

It is not a de Polignac number, because 123157513 - 2¹ = 123157511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123157511) 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, 6238 + ... + 16888.

It is an arithmetic number, because the mean of its divisors is an integer number (15935392).

Almost surely, 2^123157513 is an apocalyptic number.

It is an amenable number.

123157513 is a deficient number, since it is larger than the sum of its proper divisors (4325623).

123157513 is a wasteful number, since it uses less digits than its factorization.

123157513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11055.

The product of its digits is 3150, while the sum is 28.

The square root of 123157513 is about 11097.6354688735. The cubic root of 123157513 is about 497.5311805916.

The spelling of 123157513 in words is "one hundred twenty-three million, one hundred fifty-seven thousand, five hundred thirteen".