154249 has 4 divisors (see below), whose sum is σ = 156436. Its totient is φ = 152064.

The previous prime is 154247. The next prime is 154267. The reversal of 154249 is 942451.

154249 = T₂₅ + T₂₆ + ... + T₉₇.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942451 = 449 ⋅2099.

It can be written as a sum of positive squares in 2 ways, for example, as 28224 + 126025 = 168^2 + 355^2 .

It is a cyclic number.

It is not a de Polignac number, because 154249 - 2¹ = 154247 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154243) 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, 984 + ... + 1129.

It is an arithmetic number, because the mean of its divisors is an integer number (39109).

2¹⁵⁴²⁴⁹ is an apocalyptic number.

It is an amenable number.

154249 is a deficient number, since it is larger than the sum of its proper divisors (2187).

154249 is an equidigital number, since it uses as much as digits as its factorization.

154249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186.

The product of its digits is 1440, while the sum is 25.

The square root of 154249 is about 392.7454646460. The cubic root of 154249 is about 53.6299574496.

The spelling of 154249 in words is "one hundred fifty-four thousand, two hundred forty-nine".