125591481 has 12 divisors (see below), whose sum is σ = 181546560. Its totient is φ = 83664600.

The previous prime is 125591449. The next prime is 125591491. The reversal of 125591481 is 184195521.

125591481 is a `hidden beast` number, since 1 + 25 + 591 + 48 + 1 = 666.

It is not a de Polignac number, because 125591481 - 2⁵ = 125591449 is a prime.

It is a super-2 number, since 2×125591481² = 31546440199546722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125591491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9556 + ... + 18506.

It is an arithmetic number, because the mean of its divisors is an integer number (15128880).

Almost surely, 2^125591481 is an apocalyptic number.

It is an amenable number.

125591481 is a deficient number, since it is larger than the sum of its proper divisors (55955079).

125591481 is a wasteful number, since it uses less digits than its factorization.

125591481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10516 (or 10513 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 125591481 is about 11206.7605042671. The cubic root of 125591481 is about 500.7874006827.

The spelling of 125591481 in words is "one hundred twenty-five million, five hundred ninety-one thousand, four hundred eighty-one".