3129249 has 4 divisors (see below), whose sum is σ = 4172336. Its totient is φ = 2086164.

The previous prime is 3129223. The next prime is 3129253. The reversal of 3129249 is 9429213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9429213 = 3 ⋅3143071.

It is not a de Polignac number, because 3129249 - 2⁷ = 3129121 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3129209) 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, 521539 + ... + 521544.

It is an arithmetic number, because the mean of its divisors is an integer number (1043084).

Almost surely, 2^3129249 is an apocalyptic number.

It is an amenable number.

3129249 is a deficient number, since it is larger than the sum of its proper divisors (1043087).

3129249 is a wasteful number, since it uses less digits than its factorization.

3129249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043086.

The product of its digits is 3888, while the sum is 30.

The square root of 3129249 is about 1768.9683434138. The cubic root of 3129249 is about 146.2671190422.

The spelling of 3129249 in words is "three million, one hundred twenty-nine thousand, two hundred forty-nine".