154091 has 4 divisors (see below), whose sum is σ = 176112. Its totient is φ = 132072.

The previous prime is 154087. The next prime is 154097. The reversal of 154091 is 190451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 154091 - 2² = 154087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11000 + ... + 11013.

It is an arithmetic number, because the mean of its divisors is an integer number (44028).

2¹⁵⁴⁰⁹¹ is an apocalyptic number.

154091 is a deficient number, since it is larger than the sum of its proper divisors (22021).

154091 is an equidigital number, since it uses as much as digits as its factorization.

154091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22020.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 154091 is about 392.5442650199. The cubic root of 154091 is about 53.6116398201.

The spelling of 154091 in words is "one hundred fifty-four thousand, ninety-one".