149521442 has 12 divisors (see below), whose sum is σ = 260899830. Its totient is φ = 64080576.

The previous prime is 149521439. The next prime is 149521457. The reversal of 149521442 is 244125941.

It can be written as a sum of positive squares in only one way, i.e., 134536801 + 14984641 = 11599^2 + 3871^2 .

It is a junction number, because it is equal to n+sod(n) for n = 149521399 and 149521408.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 762767 + ... + 762962.

Almost surely, 2^149521442 is an apocalyptic number.

149521442 is a deficient number, since it is larger than the sum of its proper divisors (111378388).

149521442 is a wasteful number, since it uses less digits than its factorization.

149521442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525745 (or 1525738 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 149521442 is about 12227.8960577852. The cubic root of 149521442 is about 530.7636339944.

The spelling of 149521442 in words is "one hundred forty-nine million, five hundred twenty-one thousand, four hundred forty-two".