123042511525 has 48 divisors (see below), whose sum is σ = 163064563200. Its totient is φ = 91895328000.

The previous prime is 123042511517. The next prime is 123042511609. The reversal of 123042511525 is 525115240321.

It is not a de Polignac number, because 123042511525 - 2³ = 123042511517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51893590 + ... + 51895960.

It is an arithmetic number, because the mean of its divisors is an integer number (3397178400).

Almost surely, 2^123042511525 is an apocalyptic number.

It is an amenable number.

123042511525 is a deficient number, since it is larger than the sum of its proper divisors (40022051675).

123042511525 is a wasteful number, since it uses less digits than its factorization.

123042511525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4750 (or 4745 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 123042511525 its reverse (525115240321), we get a palindrome (648157751846).

The spelling of 123042511525 in words is "one hundred twenty-three billion, forty-two million, five hundred eleven thousand, five hundred twenty-five".