151265891 has 6 divisors (see below), whose sum is σ = 175962420. Its totient is φ = 129656436.

The previous prime is 151265887. The next prime is 151265893. The reversal of 151265891 is 198562151.

It is not a de Polignac number, because 151265891 - 2² = 151265887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151265893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1543481 + ... + 1543578.

It is an arithmetic number, because the mean of its divisors is an integer number (29327070).

Almost surely, 2^151265891 is an apocalyptic number.

151265891 is a deficient number, since it is larger than the sum of its proper divisors (24696529).

151265891 is an equidigital number, since it uses as much as digits as its factorization.

151265891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087073 (or 3087066 counting only the distinct ones).

The product of its digits is 21600, while the sum is 38.

The square root of 151265891 is about 12299.0199203026. The cubic root of 151265891 is about 532.8197772176.

The spelling of 151265891 in words is "one hundred fifty-one million, two hundred sixty-five thousand, eight hundred ninety-one".