125780040 has 80 divisors (see below), whose sum is σ = 422771580. Its totient is φ = 33540480.

The previous prime is 125780033. The next prime is 125780041. The reversal of 125780040 is 40087521.

It can be written as a sum of positive squares in 2 ways, for example, as 125753796 + 26244 = 11214^2 + 162^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 125779986 and 125780013.

It is not an unprimeable number, because it can be changed into a prime (125780041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16171 + ... + 22650.

Almost surely, 2^125780040 is an apocalyptic number.

125780040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125780040 is an abundant number, since it is smaller than the sum of its proper divisors (296991540).

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

125780040 is a wasteful number, since it uses less digits than its factorization.

125780040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38844 (or 38831 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 125780040 is about 11215.1700834183. The cubic root of 125780040 is about 501.0378973806.

The spelling of 125780040 in words is "one hundred twenty-five million, seven hundred eighty thousand, forty".