149730561 has 6 divisors (see below), whose sum is σ = 216277490. Its totient is φ = 99820368.

The previous prime is 149730541. The next prime is 149730563. The reversal of 149730561 is 165037941.

149730561 is a `hidden beast` number, since 1 + 4 + 97 + 3 + 0 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 113550336 + 36180225 = 10656^2 + 6015^2 .

It is not a de Polignac number, because 149730561 - 2¹⁰ = 149729537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149730563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8318356 + ... + 8318373.

Almost surely, 2^149730561 is an apocalyptic number.

It is an amenable number.

149730561 is a deficient number, since it is larger than the sum of its proper divisors (66546929).

149730561 is a wasteful number, since it uses less digits than its factorization.

149730561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16636735 (or 16636732 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 149730561 is about 12236.4439687354. The cubic root of 149730561 is about 531.0109587362.

The spelling of 149730561 in words is "one hundred forty-nine million, seven hundred thirty thousand, five hundred sixty-one".