123615245 has 16 divisors (see below), whose sum is σ = 169147440. Its totient is φ = 85914624.

The previous prime is 123615229. The next prime is 123615251. The reversal of 123615245 is 542516321.

It can be written as a sum of positive squares in 8 ways, for example, as 28922884 + 94692361 = 5378^2 + 9731^2 .

It is a cyclic number.

It is not a de Polignac number, because 123615245 - 2⁴ = 123615229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54830 + ... + 57039.

It is an arithmetic number, because the mean of its divisors is an integer number (10571715).

Almost surely, 2^123615245 is an apocalyptic number.

It is an amenable number.

123615245 is a deficient number, since it is larger than the sum of its proper divisors (45532195).

123615245 is a wasteful number, since it uses less digits than its factorization.

123615245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111904.

The product of its digits is 7200, while the sum is 29.

The square root of 123615245 is about 11118.2392940609. The cubic root of 123615245 is about 498.1467997840.

The spelling of 123615245 in words is "one hundred twenty-three million, six hundred fifteen thousand, two hundred forty-five".