149947285 has 4 divisors (see below), whose sum is σ = 179936748. Its totient is φ = 119957824.

The previous prime is 149947253. The next prime is 149947319. The reversal of 149947285 is 582749941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582749941 = 4729 ⋅123229.

It can be written as a sum of positive squares in 2 ways, for example, as 95394289 + 54552996 = 9767^2 + 7386^2 .

It is a cyclic number.

It is not a de Polignac number, because 149947285 - 2⁵ = 149947253 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 14994724 + ... + 14994733.

It is an arithmetic number, because the mean of its divisors is an integer number (44984187).

Almost surely, 2^149947285 is an apocalyptic number.

It is an amenable number.

149947285 is a deficient number, since it is larger than the sum of its proper divisors (29989463).

149947285 is an equidigital number, since it uses as much as digits as its factorization.

149947285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29989462.

The product of its digits is 725760, while the sum is 49.

The square root of 149947285 is about 12245.2964439412. The cubic root of 149947285 is about 531.2670350247.

It can be divided in two parts, 1499 and 47285, that added together give a palindrome (48784).

The spelling of 149947285 in words is "one hundred forty-nine million, nine hundred forty-seven thousand, two hundred eighty-five".