152491 has 4 divisors (see below), whose sum is σ = 154000. Its totient is φ = 150984.

The previous prime is 152461. The next prime is 152501. The reversal of 152491 is 194251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194251 = 47 ⋅4133.

It is a cyclic number.

It is not a de Polignac number, because 152491 - 2⁵ = 152459 is a prime.

It is the 391-st Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152441) by changing a digit.

It is a nontrivial repunit in base 390.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591 + ... + 808.

It is an arithmetic number, because the mean of its divisors is an integer number (38500).

2¹⁵²⁴⁹¹ is an apocalyptic number.

152491 is a deficient number, since it is larger than the sum of its proper divisors (1509).

152491 is a wasteful number, since it uses less digits than its factorization.

152491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508.

The product of its digits is 360, while the sum is 22.

The square root of 152491 is about 390.5009603061. The cubic root of 152491 is about 53.4254354739.

The spelling of 152491 in words is "one hundred fifty-two thousand, four hundred ninety-one".