151665 has 8 divisors (see below), whose sum is σ = 242688. Its totient is φ = 80880.

The previous prime is 151651. The next prime is 151667. The reversal of 151665 is 566151.

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

It is not a de Polignac number, because 151665 - 2⁷ = 151537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5041 + ... + 5070.

It is an arithmetic number, because the mean of its divisors is an integer number (30336).

2¹⁵¹⁶⁶⁵ is an apocalyptic number.

151665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

151665 is a deficient number, since it is larger than the sum of its proper divisors (91023).

151665 is a wasteful number, since it uses less digits than its factorization.

151665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10119.

The product of its digits is 900, while the sum is 24.

The square root of 151665 is about 389.4419083766. The cubic root of 151665 is about 53.3287973573.

The spelling of 151665 in words is "one hundred fifty-one thousand, six hundred sixty-five".