149142 has 32 divisors (see below), whose sum is σ = 352512. Its totient is φ = 41184.

The previous prime is 149119. The next prime is 149143. The reversal of 149142 is 241941.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149143) by changing a digit.

149142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2193 + ... + 2259.

It is an arithmetic number, because the mean of its divisors is an integer number (11016).

2¹⁴⁹¹⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176256).

149142 is an abundant number, since it is smaller than the sum of its proper divisors (203370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149142 is a wasteful number, since it uses less digits than its factorization.

149142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132.

The product of its digits is 288, while the sum is 21.

The square root of 149142 is about 386.1890728646. The cubic root of 149142 is about 53.0314279011.

The spelling of 149142 in words is "one hundred forty-nine thousand, one hundred forty-two".