125831040 has 64 divisors (see below), whose sum is σ = 401092560. Its totient is φ = 33554432.

The previous prime is 125831039. The next prime is 125831047. The reversal of 125831040 is 40138521.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 125831040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125831047) by changing a digit.

In principle, a polygon with 125831040 sides can be constructed with ruler and compass.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30849 + ... + 34688.

Almost surely, 2^125831040 is an apocalyptic number.

125831040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125831040 is an abundant number, since it is smaller than the sum of its proper divisors (275261520).

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

125831040 is an equidigital number, since it uses as much as digits as its factorization.

125831040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65559 (or 65547 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 125831040 is about 11217.4435590289. The cubic root of 125831040 is about 501.1056067986.

Adding to 125831040 its reverse (40138521), we get a palindrome (165969561).

The spelling of 125831040 in words is "one hundred twenty-five million, eight hundred thirty-one thousand, forty".