125123435530 has 32 divisors (see below), whose sum is σ = 239319288720. Its totient is φ = 46937640960.

The previous prime is 125123435509. The next prime is 125123435531. The reversal of 125123435530 is 35534321521.

It can be written as a sum of positive squares in 8 ways, for example, as 110006978929 + 15116456601 = 331673^2 + 122949^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (125123435531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1261875 + ... + 1357414.

Almost surely, 2^125123435530 is an apocalyptic number.

125123435530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125123435530 is a deficient number, since it is larger than the sum of its proper divisors (114195853190).

125123435530 is a wasteful number, since it uses less digits than its factorization.

125123435530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619594.

The product of its (nonzero) digits is 54000, while the sum is 34.

The spelling of 125123435530 in words is "one hundred twenty-five billion, one hundred twenty-three million, four hundred thirty-five thousand, five hundred thirty".