149926865 has 12 divisors (see below), whose sum is σ = 197755572. Its totient is φ = 109037280.

The previous prime is 149926831. The next prime is 149926867. The reversal of 149926865 is 568629941.

It can be written as a sum of positive squares in 2 ways, for example, as 24285184 + 125641681 = 4928^2 + 11209^2 .

It is not a de Polignac number, because 149926865 - 2¹² = 149922769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149926867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123302 + ... + 124511.

It is an arithmetic number, because the mean of its divisors is an integer number (16479631).

Almost surely, 2^149926865 is an apocalyptic number.

It is an amenable number.

149926865 is a deficient number, since it is larger than the sum of its proper divisors (47828707).

149926865 is a wasteful number, since it uses less digits than its factorization.

149926865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247840 (or 247829 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 149926865 is about 12244.4626260200. The cubic root of 149926865 is about 531.2429177372.

The spelling of 149926865 in words is "one hundred forty-nine million, nine hundred twenty-six thousand, eight hundred sixty-five".