154491 has 8 divisors (see below), whose sum is σ = 215040. Its totient is φ = 98472.

The previous prime is 154487. The next prime is 154493. The reversal of 154491 is 194451.

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

It is not a de Polignac number, because 154491 - 2² = 154487 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

154491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (154493) 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, 1051 + ... + 1188.

It is an arithmetic number, because the mean of its divisors is an integer number (26880).

2¹⁵⁴⁴⁹¹ is an apocalyptic number.

154491 is a deficient number, since it is larger than the sum of its proper divisors (60549).

154491 is a wasteful number, since it uses less digits than its factorization.

154491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265.

The product of its digits is 720, while the sum is 24.

The square root of 154491 is about 393.0534314823. The cubic root of 154491 is about 53.6579893296.

The spelling of 154491 in words is "one hundred fifty-four thousand, four hundred ninety-one".