123540525 has 24 divisors (see below), whose sum is σ = 226949760. Its totient is φ = 65887920.

The previous prime is 123540523. The next prime is 123540539. The reversal of 123540525 is 525045321.

It is a happy number.

123540525 is a `hidden beast` number, since 1 + 235 + 405 + 25 = 666.

It is not a de Polignac number, because 123540525 - 2¹ = 123540523 is a prime.

It is a super-2 number, since 2×123540525² = 30524522634551250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123540523) 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, 90837 + ... + 92186.

It is an arithmetic number, because the mean of its divisors is an integer number (9456240).

Almost surely, 2^123540525 is an apocalyptic number.

123540525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123540525 is a deficient number, since it is larger than the sum of its proper divisors (103409235).

123540525 is a wasteful number, since it uses less digits than its factorization.

123540525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183042 (or 183031 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 123540525 is about 11114.8785418465. The cubic root of 123540525 is about 498.0464102487.

Adding to 123540525 its reverse (525045321), we get a palindrome (648585846).

The spelling of 123540525 in words is "one hundred twenty-three million, five hundred forty thousand, five hundred twenty-five".