149942143 has 4 divisors (see below), whose sum is σ = 161476168. Its totient is φ = 138408120.

The previous prime is 149942137. The next prime is 149942183. The reversal of 149942143 is 341249941.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149942143 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 (149942183) 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, 5766993 + ... + 5767018.

It is an arithmetic number, because the mean of its divisors is an integer number (40369042).

Almost surely, 2^149942143 is an apocalyptic number.

149942143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

149942143 is a deficient number, since it is larger than the sum of its proper divisors (11534025).

149942143 is a wasteful number, since it uses less digits than its factorization.

149942143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11534024.

The product of its digits is 31104, while the sum is 37.

The square root of 149942143 is about 12245.0864839739. The cubic root of 149942143 is about 531.2609622098.

The spelling of 149942143 in words is "one hundred forty-nine million, nine hundred forty-two thousand, one hundred forty-three".