123515122025 has 12 divisors (see below), whose sum is σ = 158099357184. Its totient is φ = 95624610000.

The previous prime is 123515121959. The next prime is 123515122061. The reversal of 123515122025 is 520221515321.

It is a happy number.

It is not a de Polignac number, because 123515122025 - 2¹⁴ = 123515105641 is a prime.

It is a super-3 number, since 3×123515122025³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79686401 + ... + 79687950.

It is an arithmetic number, because the mean of its divisors is an integer number (13174946432).

Almost surely, 2^123515122025 is an apocalyptic number.

It is an amenable number.

123515122025 is a deficient number, since it is larger than the sum of its proper divisors (34584235159).

123515122025 is a wasteful number, since it uses less digits than its factorization.

123515122025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159374392 (or 159374387 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 123515122025 its reverse (520221515321), we get a palindrome (643736637346).

The spelling of 123515122025 in words is "one hundred twenty-three billion, five hundred fifteen million, one hundred twenty-two thousand, twenty-five".