154109 has 4 divisors (see below), whose sum is σ = 162240. Its totient is φ = 145980.

The previous prime is 154097. The next prime is 154111. The reversal of 154109 is 901451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4037 + ... + 4074.

It is an arithmetic number, because the mean of its divisors is an integer number (40560).

2¹⁵⁴¹⁰⁹ is an apocalyptic number.

154109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

154109 is a deficient number, since it is larger than the sum of its proper divisors (8131).

154109 is an equidigital number, since it uses as much as digits as its factorization.

154109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8130.

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

The square root of 154109 is about 392.5671917010. The cubic root of 154109 is about 53.6137272704.

The spelling of 154109 in words is "one hundred fifty-four thousand, one hundred nine".