125913491 has 8 divisors (see below), whose sum is σ = 138184704. Its totient is φ = 113779720.

The previous prime is 125913467. The next prime is 125913499. The reversal of 125913491 is 194319521.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125913491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125913499) 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, 32435 + ... + 36108.

It is an arithmetic number, because the mean of its divisors is an integer number (17273088).

Almost surely, 2^125913491 is an apocalyptic number.

125913491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125913491 is a deficient number, since it is larger than the sum of its proper divisors (12271213).

125913491 is a wasteful number, since it uses less digits than its factorization.

125913491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68721.

The product of its digits is 9720, while the sum is 35.

The square root of 125913491 is about 11221.1180815461. The cubic root of 125913491 is about 501.2150329979.

The spelling of 125913491 in words is "one hundred twenty-five million, nine hundred thirteen thousand, four hundred ninety-one".