149421171 has 4 divisors (see below), whose sum is σ = 199228232. Its totient is φ = 99614112.

The previous prime is 149421163. The next prime is 149421191. The reversal of 149421171 is 171124941.

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

It is not a de Polignac number, because 149421171 - 2³ = 149421163 is a prime.

It is a super-2 number, since 2×149421171² = 44653372686022482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149421101) 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, 24903526 + ... + 24903531.

It is an arithmetic number, because the mean of its divisors is an integer number (49807058).

Almost surely, 2^149421171 is an apocalyptic number.

149421171 is a deficient number, since it is larger than the sum of its proper divisors (49807061).

149421171 is an equidigital number, since it uses as much as digits as its factorization.

149421171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49807060.

The product of its digits is 2016, while the sum is 30.

The square root of 149421171 is about 12223.7952780632. The cubic root of 149421171 is about 530.6449618254.

The spelling of 149421171 in words is "one hundred forty-nine million, four hundred twenty-one thousand, one hundred seventy-one".