149671 has 4 divisors (see below), whose sum is σ = 151312. Its totient is φ = 148032.

The previous prime is 149629. The next prime is 149689. The reversal of 149671 is 176941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176941 = 59 ⋅2999.

It is a cyclic number.

It is not a de Polignac number, because 149671 - 2⁷ = 149543 is a prime.

It is a Duffinian number.

149671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149371) 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, 675 + ... + 868.

It is an arithmetic number, because the mean of its divisors is an integer number (37828).

2¹⁴⁹⁶⁷¹ is an apocalyptic number.

149671 is a deficient number, since it is larger than the sum of its proper divisors (1641).

149671 is an equidigital number, since it uses as much as digits as its factorization.

149671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640.

The product of its digits is 1512, while the sum is 28.

The square root of 149671 is about 386.8733642938. The cubic root of 149671 is about 53.0940539493.

It can be divided in two parts, 149 and 671, that added together give a triangular number (820 = T₄₀).

The spelling of 149671 in words is "one hundred forty-nine thousand, six hundred seventy-one".