125137540 has 24 divisors (see below), whose sum is σ = 286679232. Its totient is φ = 45504480.

The previous prime is 125137531. The next prime is 125137567. The reversal of 125137540 is 45731521.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 125137499 and 125137508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284184 + ... + 284623.

It is an arithmetic number, because the mean of its divisors is an integer number (11944968).

Almost surely, 2^125137540 is an apocalyptic number.

125137540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125137540 is an abundant number, since it is smaller than the sum of its proper divisors (161541692).

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

125137540 is a wasteful number, since it uses less digits than its factorization.

125137540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568827 (or 568825 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 125137540 is about 11186.4891722113. The cubic root of 125137540 is about 500.1833194464.

The spelling of 125137540 in words is "one hundred twenty-five million, one hundred thirty-seven thousand, five hundred forty".