125881305 has 16 divisors (see below), whose sum is σ = 219720384. Its totient is φ = 61033280.

The previous prime is 125881303. The next prime is 125881313. The reversal of 125881305 is 503188521.

It is a happy number.

It is not a de Polignac number, because 125881305 - 2¹ = 125881303 is a prime.

It is a super-2 number, since 2×125881305² = 31692205897006050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125881303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381294 + ... + 381623.

It is an arithmetic number, because the mean of its divisors is an integer number (13732524).

Almost surely, 2^125881305 is an apocalyptic number.

125881305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125881305 is a deficient number, since it is larger than the sum of its proper divisors (93839079).

125881305 is a wasteful number, since it uses less digits than its factorization.

125881305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762936.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 125881305 is about 11219.6838190744. The cubic root of 125881305 is about 501.1723225050.

The spelling of 125881305 in words is "one hundred twenty-five million, eight hundred eighty-one thousand, three hundred five".