149402171 has 16 divisors (see below), whose sum is σ = 164656800. Its totient is φ = 134926848.

The previous prime is 149402153. The next prime is 149402203. The reversal of 149402171 is 171204941.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149402171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149402131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87401 + ... + 89093.

It is an arithmetic number, because the mean of its divisors is an integer number (10291050).

Almost surely, 2^149402171 is an apocalyptic number.

149402171 is a deficient number, since it is larger than the sum of its proper divisors (15254629).

149402171 is a wasteful number, since it uses less digits than its factorization.

149402171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 149402171 is about 12223.0180806542. The cubic root of 149402171 is about 530.6224690698.

The spelling of 149402171 in words is "one hundred forty-nine million, four hundred two thousand, one hundred seventy-one".