125878791 has 8 divisors (see below), whose sum is σ = 170137840. Its totient is φ = 82769472.

The previous prime is 125878787. The next prime is 125878813. The reversal of 125878791 is 197878521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125878791 - 2² = 125878787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125878791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125878721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287176 + ... + 287613.

It is an arithmetic number, because the mean of its divisors is an integer number (21267230).

Almost surely, 2^125878791 is an apocalyptic number.

125878791 is a deficient number, since it is larger than the sum of its proper divisors (44259049).

125878791 is an equidigital number, since it uses as much as digits as its factorization.

125878791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574865.

The product of its digits is 282240, while the sum is 48.

The square root of 125878791 is about 11219.5717832723. The cubic root of 125878791 is about 501.1689861462.

The spelling of 125878791 in words is "one hundred twenty-five million, eight hundred seventy-eight thousand, seven hundred ninety-one".