3129849 has 12 divisors (see below), whose sum is σ = 4595812. Its totient is φ = 2052000.

The previous prime is 3129839. The next prime is 3129859. The reversal of 3129849 is 9489213.

It is an interprime number because it is at equal distance from previous prime (3129839) and next prime (3129859).

It can be written as a sum of positive squares in 2 ways, for example, as 1225449 + 1904400 = 1107^2 + 1380^2 .

It is not a de Polignac number, because 3129849 - 2¹² = 3125753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3129839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2302 + ... + 3399.

Almost surely, 2^3129849 is an apocalyptic number.

It is an amenable number.

3129849 is a deficient number, since it is larger than the sum of its proper divisors (1465963).

3129849 is a wasteful number, since it uses less digits than its factorization.

3129849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5768 (or 5765 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 3129849 is about 1769.1379256576. The cubic root of 3129849 is about 146.2764668296.

The spelling of 3129849 in words is "three million, one hundred twenty-nine thousand, eight hundred forty-nine".