123515049 has 24 divisors (see below), whose sum is σ = 192752832. Its totient is φ = 68916960.

The previous prime is 123515023. The next prime is 123515059. The reversal of 123515049 is 940515321.

It is not a de Polignac number, because 123515049 - 2⁸ = 123514793 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (123515009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37239 + ... + 40419.

It is an arithmetic number, because the mean of its divisors is an integer number (8031368).

Almost surely, 2^123515049 is an apocalyptic number.

It is an amenable number.

123515049 is a deficient number, since it is larger than the sum of its proper divisors (69237783).

123515049 is an equidigital number, since it uses as much as digits as its factorization.

123515049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277 (or 3234 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 123515049 is about 11113.7324513414. The cubic root of 123515049 is about 498.0121728932.

The spelling of 123515049 in words is "one hundred twenty-three million, five hundred fifteen thousand, forty-nine".