125781845 has 16 divisors (see below), whose sum is σ = 178450560. Its totient is φ = 83275584.

The previous prime is 125781829. The next prime is 125781863. The reversal of 125781845 is 548187521.

It is not a de Polignac number, because 125781845 - 2⁴ = 125781829 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60947 + ... + 62976.

It is an arithmetic number, because the mean of its divisors is an integer number (11153160).

Almost surely, 2^125781845 is an apocalyptic number.

It is an amenable number.

125781845 is a deficient number, since it is larger than the sum of its proper divisors (52668715).

125781845 is a wasteful number, since it uses less digits than its factorization.

125781845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123964.

The product of its digits is 89600, while the sum is 41.

The square root of 125781845 is about 11215.2505544905. The cubic root of 125781845 is about 501.0402940754.

The spelling of 125781845 in words is "one hundred twenty-five million, seven hundred eighty-one thousand, eight hundred forty-five".