125000690520 has 128 divisors (see below), whose sum is σ = 385123507200. Its totient is φ = 32441773056.

The previous prime is 125000690519. The next prime is 125000690527. The reversal of 125000690520 is 25096000521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125000690527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 947652 + ... + 1071468.

It is an arithmetic number, because the mean of its divisors is an integer number (3008777400).

Almost surely, 2^125000690520 is an apocalyptic number.

125000690520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125000690520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192561753600).

125000690520 is an abundant number, since it is smaller than the sum of its proper divisors (260122816680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125000690520 is a wasteful number, since it uses less digits than its factorization.

125000690520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124057 (or 124053 counting only the distinct ones).

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

The spelling of 125000690520 in words is "one hundred twenty-five billion, six hundred ninety thousand, five hundred twenty".