149721236 has 24 divisors (see below), whose sum is σ = 300115200. Its totient is φ = 64022112.

The previous prime is 149721223. The next prime is 149721251. The reversal of 149721236 is 632127941.

It is a junction number, because it is equal to n+sod(n) for n = 149721196 and 149721205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7190 + ... + 18738.

It is an arithmetic number, because the mean of its divisors is an integer number (12504800).

Almost surely, 2^149721236 is an apocalyptic number.

It is an amenable number.

149721236 is an abundant number, since it is smaller than the sum of its proper divisors (150393964).

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

149721236 is a wasteful number, since it uses less digits than its factorization.

149721236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12023 (or 12021 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 149721236 is about 12236.0629289000. The cubic root of 149721236 is about 530.9999349792. Note that the first 4 decimals are identical.

The spelling of 149721236 in words is "one hundred forty-nine million, seven hundred twenty-one thousand, two hundred thirty-six".