149211871 has 4 divisors (see below), whose sum is σ = 149538832. Its totient is φ = 148884912.

The previous prime is 149211869. The next prime is 149211901. The reversal of 149211871 is 178112941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178112941 = 89 ⋅2001269.

It is a cyclic number.

It is not a de Polignac number, because 149211871 - 2¹ = 149211869 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 (149211841) 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, 162795 + ... + 163708.

It is an arithmetic number, because the mean of its divisors is an integer number (37384708).

Almost surely, 2^149211871 is an apocalyptic number.

149211871 is a deficient number, since it is larger than the sum of its proper divisors (326961).

149211871 is an equidigital number, since it uses as much as digits as its factorization.

149211871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326960.

The product of its digits is 4032, while the sum is 34.

The square root of 149211871 is about 12215.2311071056. The cubic root of 149211871 is about 530.3970810926.

The spelling of 149211871 in words is "one hundred forty-nine million, two hundred eleven thousand, eight hundred seventy-one".