149204281 has 4 divisors (see below), whose sum is σ = 152674192. Its totient is φ = 145734372.

The previous prime is 149204269. The next prime is 149204309. The reversal of 149204281 is 182402941.

149204281 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 a de Polignac number, because none of the positive numbers 2^k-149204281 is a prime.

It is a super-2 number, since 2×149204281² = 44523834937453922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149204261) 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, 1734891 + ... + 1734976.

It is an arithmetic number, because the mean of its divisors is an integer number (38168548).

Almost surely, 2^149204281 is an apocalyptic number.

It is an amenable number.

149204281 is a deficient number, since it is larger than the sum of its proper divisors (3469911).

149204281 is an equidigital number, since it uses as much as digits as its factorization.

149204281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469910.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 149204281 is about 12214.9204254469. The cubic root of 149204281 is about 530.3880876568.

The spelling of 149204281 in words is "one hundred forty-nine million, two hundred four thousand, two hundred eighty-one".