125783685 has 20 divisors (see below), whose sum is σ = 225479628. Its totient is φ = 67084416.

The previous prime is 125783653. The next prime is 125783687. The reversal of 125783685 is 586387521.

125783685 is a `hidden beast` number, since 12 + 578 + 3 + 68 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 75742209 + 50041476 = 8703^2 + 7074^2 .

It is not a de Polignac number, because 125783685 - 2⁵ = 125783653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 125783685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125783687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 154884 + ... + 155693.

Almost surely, 2^125783685 is an apocalyptic number.

125783685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125783685 is a deficient number, since it is larger than the sum of its proper divisors (99695943).

125783685 is an equidigital number, since it uses as much as digits as its factorization.

125783685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310594 (or 310585 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 125783685 is about 11215.3325853494. The cubic root of 125783685 is about 501.0427372198.

The spelling of 125783685 in words is "one hundred twenty-five million, seven hundred eighty-three thousand, six hundred eighty-five".