125445540 has 144 divisors (see below), whose sum is σ = 397365696. Its totient is φ = 29525760.

The previous prime is 125445521. The next prime is 125445571. The reversal of 125445540 is 45544521.

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

It is a junction number, because it is equal to n+sod(n) for n = 125445498 and 125445507.

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, 268387 + ... + 268853.

It is an arithmetic number, because the mean of its divisors is an integer number (2759484).

Almost surely, 2^125445540 is an apocalyptic number.

125445540 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 125445540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198682848).

125445540 is an abundant number, since it is smaller than the sum of its proper divisors (271920156).

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

125445540 is a wasteful number, since it uses less digits than its factorization.

125445540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 125445540 is about 11200.2473186979. The cubic root of 125445540 is about 500.5933489289.

The spelling of 125445540 in words is "one hundred twenty-five million, four hundred forty-five thousand, five hundred forty".