125881099 has 4 divisors (see below), whose sum is σ = 132506440. Its totient is φ = 119255760.

The previous prime is 125881057. The next prime is 125881117. The reversal of 125881099 is 990188521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125881099 - 2¹⁹ = 125356811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125881009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3312642 + ... + 3312679.

It is an arithmetic number, because the mean of its divisors is an integer number (33126610).

Almost surely, 2^125881099 is an apocalyptic number.

125881099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

125881099 is a deficient number, since it is larger than the sum of its proper divisors (6625341).

125881099 is an equidigital number, since it uses as much as digits as its factorization.

125881099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6625340.

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 125881099 is about 11219.6746387763. The cubic root of 125881099 is about 501.1720491217.

The spelling of 125881099 in words is "one hundred twenty-five million, eight hundred eighty-one thousand, ninety-nine".