149231 has 4 divisors (see below), whose sum is σ = 151200. Its totient is φ = 147264.

The previous prime is 149213. The next prime is 149239. The reversal of 149231 is 132941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132941 = 37 ⋅3593.

It is a cyclic number.

It is not a de Polignac number, because 149231 - 2¹⁰ = 148207 is a prime.

It is a super-2 number, since 2×149231² = 44539782722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149239) 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, 866 + ... + 1023.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2¹⁴⁹²³¹ is an apocalyptic number.

149231 is a deficient number, since it is larger than the sum of its proper divisors (1969).

149231 is an equidigital number, since it uses as much as digits as its factorization.

149231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968.

The product of its digits is 216, while the sum is 20.

The square root of 149231 is about 386.3042842113. The cubic root of 149231 is about 53.0419745804.

Subtracting from 149231 its reverse (132941), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 149231 in words is "one hundred forty-nine thousand, two hundred thirty-one".