149881 has 4 divisors (see below), whose sum is σ = 152064. Its totient is φ = 147700.

The previous prime is 149873. The next prime is 149893. The reversal of 149881 is 188941.

149881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 149881 - 2³ = 149873 is a prime.

It is a super-2 number, since 2×149881² = 44928628322, which contains 22 as substring.

It is a Duffinian number.

149881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (149861) 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, 985 + ... + 1126.

It is an arithmetic number, because the mean of its divisors is an integer number (38016).

2¹⁴⁹⁸⁸¹ is an apocalyptic number.

It is an amenable number.

149881 is a deficient number, since it is larger than the sum of its proper divisors (2183).

149881 is an equidigital number, since it uses as much as digits as its factorization.

149881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182.

The product of its digits is 2304, while the sum is 31.

The square root of 149881 is about 387.1446757996. The cubic root of 149881 is about 53.1188740341.

Subtracting 149881 from its reverse (188941), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 149881 in words is "one hundred forty-nine thousand, eight hundred eighty-one".