3149645 has 4 divisors (see below), whose sum is σ = 3779580. Its totient is φ = 2519712.

The previous prime is 3149639. The next prime is 3149647. The reversal of 3149645 is 5469413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1865956 + 1283689 = 1366^2 + 1133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3149645 is a prime.

It is a super-3 number, since 3×3149645³ = 93735926185174533375, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3149647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314960 + ... + 314969.

It is an arithmetic number, because the mean of its divisors is an integer number (944895).

Almost surely, 2^3149645 is an apocalyptic number.

It is an amenable number.

3149645 is a deficient number, since it is larger than the sum of its proper divisors (629935).

3149645 is an equidigital number, since it uses as much as digits as its factorization.

3149645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629934.

The product of its digits is 12960, while the sum is 32.

The square root of 3149645 is about 1774.7239221918. The cubic root of 3149645 is about 146.5842138713.

The spelling of 3149645 in words is "three million, one hundred forty-nine thousand, six hundred forty-five".