125783440 has 40 divisors (see below), whose sum is σ = 302536440. Its totient is φ = 48577536.

The previous prime is 125783423. The next prime is 125783491. The reversal of 125783440 is 44387521.

It can be written as a sum of positive squares in 4 ways, for example, as 1327104 + 124456336 = 1152^2 + 11156^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 125783396 and 125783405.

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, 24789 + ... + 29428.

It is an arithmetic number, because the mean of its divisors is an integer number (7563411).

Almost surely, 2^125783440 is an apocalyptic number.

125783440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125783440 is an abundant number, since it is smaller than the sum of its proper divisors (176753000).

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

125783440 is a wasteful number, since it uses less digits than its factorization.

125783440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54259 (or 54253 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 125783440 is about 11215.3216627968. The cubic root of 125783440 is about 501.0424119112.

The spelling of 125783440 in words is "one hundred twenty-five million, seven hundred eighty-three thousand, four hundred forty".