3212749 has 4 divisors (see below), whose sum is σ = 3216636. Its totient is φ = 3208864.

The previous prime is 3212743. The next prime is 3212753. The reversal of 3212749 is 9472123.

3212749 = T₁₄₆₂ + T₁₄₆₃ + T₁₄₆₄.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1483524 + 1729225 = 1218^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 3212749 - 2¹³ = 3204557 is a prime.

It is a super-2 number, since 2×3212749² = 20643512274002, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3212743) 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, 154 + ... + 2539.

It is an arithmetic number, because the mean of its divisors is an integer number (804159).

Almost surely, 2^3212749 is an apocalyptic number.

3212749 is the 1464-th centered triangular number.

It is an amenable number.

3212749 is a deficient number, since it is larger than the sum of its proper divisors (3887).

3212749 is a wasteful number, since it uses less digits than its factorization.

3212749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3886.

The product of its digits is 3024, while the sum is 28.

The square root of 3212749 is about 1792.4142936275. The cubic root of 3212749 is about 147.5566994504.

The spelling of 3212749 in words is "three million, two hundred twelve thousand, seven hundred forty-nine".