149973642 has 72 divisors (see below), whose sum is σ = 402184224. Its totient is φ = 39547872.

The previous prime is 149973611. The next prime is 149973667. The reversal of 149973642 is 246379941.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17773 + ... + 24815.

It is an arithmetic number, because the mean of its divisors is an integer number (5585892).

Almost surely, 2^149973642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149973642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201092112).

149973642 is an abundant number, since it is smaller than the sum of its proper divisors (252210582).

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

149973642 is a wasteful number, since it uses less digits than its factorization.

149973642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7084 (or 7068 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 149973642 is about 12246.3726057964. The cubic root of 149973642 is about 531.2981610409.

The spelling of 149973642 in words is "one hundred forty-nine million, nine hundred seventy-three thousand, six hundred forty-two".