125540040 has 64 divisors (see below), whose sum is σ = 383745600. Its totient is φ = 32844032.

The previous prime is 125540027. The next prime is 125540047. The reversal of 125540040 is 40045521.

It is a junction number, because it is equal to n+sod(n) for n = 125539989 and 125540016.

It is not an unprimeable number, because it can be changed into a prime (125540047) 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, 3510 + ... + 16229.

It is an arithmetic number, because the mean of its divisors is an integer number (5996025).

Almost surely, 2^125540040 is an apocalyptic number.

125540040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125540040 is an abundant number, since it is smaller than the sum of its proper divisors (258205560).

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

125540040 is a wasteful number, since it uses less digits than its factorization.

125540040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19806 (or 19802 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 125540040 is about 11204.4651813462. The cubic root of 125540040 is about 500.7190188615.

Adding to 125540040 its reverse (40045521), we get a palindrome (165585561).

The spelling of 125540040 in words is "one hundred twenty-five million, five hundred forty thousand, forty".