151791 has 8 divisors (see below), whose sum is σ = 213120. Its totient is φ = 95832.

The previous prime is 151787. The next prime is 151799. The reversal of 151791 is 197151.

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

It is not a de Polignac number, because 151791 - 2² = 151787 is a prime.

151791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151799) 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, 1275 + ... + 1388.

It is an arithmetic number, because the mean of its divisors is an integer number (26640).

2¹⁵¹⁷⁹¹ is an apocalyptic number.

151791 is a deficient number, since it is larger than the sum of its proper divisors (61329).

151791 is a wasteful number, since it uses less digits than its factorization.

151791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685.

The product of its digits is 315, while the sum is 24.

The square root of 151791 is about 389.6036447468. The cubic root of 151791 is about 53.3435614064.

The spelling of 151791 in words is "one hundred fifty-one thousand, seven hundred ninety-one".