155249 has 4 divisors (see below), whose sum is σ = 163440. Its totient is φ = 147060.

The previous prime is 155231. The next prime is 155251. The reversal of 155249 is 942551.

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, and also an emirpimes, since its reverse is a distinct semiprime: 942551 = 241 ⋅3911.

It is not a de Polignac number, because 155249 - 2¹² = 151153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155209) 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, 4067 + ... + 4104.

It is an arithmetic number, because the mean of its divisors is an integer number (40860).

2¹⁵⁵²⁴⁹ is an apocalyptic number.

155249 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

155249 is a deficient number, since it is larger than the sum of its proper divisors (8191).

155249 is an equidigital number, since it uses as much as digits as its factorization.

155249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8190.

The product of its digits is 1800, while the sum is 26.

The square root of 155249 is about 394.0164971166. The cubic root of 155249 is about 53.7456026689.

It can be divided in two parts, 155 and 249, that added together give a palindrome (404).

The spelling of 155249 in words is "one hundred fifty-five thousand, two hundred forty-nine".