125594781 has 16 divisors (see below), whose sum is σ = 182032704. Its totient is φ = 76564224.

The previous prime is 125594741. The next prime is 125594797. The reversal of 125594781 is 187495521.

It is not a de Polignac number, because 125594781 - 2⁶ = 125594717 is a prime.

It is a super-2 number, since 2×125594781² = 31548098028875922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125594741) 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 15 ways as a sum of consecutive naturals, for example, 10876 + ... + 19221.

It is an arithmetic number, because the mean of its divisors is an integer number (11377044).

Almost surely, 2^125594781 is an apocalyptic number.

It is an amenable number.

125594781 is a deficient number, since it is larger than the sum of its proper divisors (56437923).

125594781 is a wasteful number, since it uses less digits than its factorization.

125594781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30220.

The product of its digits is 100800, while the sum is 42.

The square root of 125594781 is about 11206.9077358565. The cubic root of 125594781 is about 500.7917868187.

The spelling of 125594781 in words is "one hundred twenty-five million, five hundred ninety-four thousand, seven hundred eighty-one".