150591 has 16 divisors (see below), whose sum is σ = 235008. Its totient is φ = 84000.

The previous prime is 150589. The next prime is 150607. The reversal of 150591 is 195051.

It is a happy number.

It is not a de Polignac number, because 150591 - 2¹ = 150589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

150591 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1441 + ... + 1541.

It is an arithmetic number, because the mean of its divisors is an integer number (14688).

2¹⁵⁰⁵⁹¹ is an apocalyptic number.

150591 is a deficient number, since it is larger than the sum of its proper divisors (84417).

150591 is a wasteful number, since it uses less digits than its factorization.

150591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182.

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 150591 is about 388.0605622838. The cubic root of 150591 is about 53.2026182592.

It can be divided in two parts, 1505 and 91, that added together give a triangular number (1596 = T₅₆).

The spelling of 150591 in words is "one hundred fifty thousand, five hundred ninety-one".