149390945 has 16 divisors (see below), whose sum is σ = 196983360. Its totient is φ = 107860800.

The previous prime is 149390929. The next prime is 149390947. The reversal of 149390945 is 549093941.

It is a happy number.

It is not a de Polignac number, because 149390945 - 2⁴ = 149390929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149390896 and 149390905.

It is not an unprimeable number, because it can be changed into a prime (149390947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2126 + ... + 17415.

It is an arithmetic number, because the mean of its divisors is an integer number (12311460).

Almost surely, 2^149390945 is an apocalyptic number.

It is an amenable number.

149390945 is a deficient number, since it is larger than the sum of its proper divisors (47592415).

149390945 is a wasteful number, since it uses less digits than its factorization.

149390945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19696.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 149390945 is about 12222.5588564752. The cubic root of 149390945 is about 530.6091785065.

The spelling of 149390945 in words is "one hundred forty-nine million, three hundred ninety thousand, nine hundred forty-five".