149131271 has 4 divisors (see below), whose sum is σ = 149329032. Its totient is φ = 148933512.

The previous prime is 149131261. The next prime is 149131289. The reversal of 149131271 is 172131941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149131271 - 2²⁶ = 82022407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149131211) 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, 97745 + ... + 99258.

It is an arithmetic number, because the mean of its divisors is an integer number (37332258).

Almost surely, 2^149131271 is an apocalyptic number.

149131271 is a deficient number, since it is larger than the sum of its proper divisors (197761).

149131271 is an equidigital number, since it uses as much as digits as its factorization.

149131271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197760.

The product of its digits is 1512, while the sum is 29.

The square root of 149131271 is about 12211.9315016094. The cubic root of 149131271 is about 530.3015620962.

The spelling of 149131271 in words is "one hundred forty-nine million, one hundred thirty-one thousand, two hundred seventy-one".