3215947 has 4 divisors (see below), whose sum is σ = 3675376. Its totient is φ = 2756520.

The previous prime is 3215939. The next prime is 3215963. The reversal of 3215947 is 7495123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7495123 = 2699 ⋅2777.

It is a cyclic number.

It is not a de Polignac number, because 3215947 - 2³ = 3215939 is a prime.

It is a Duffinian number.

3215947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3215977) 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, 229704 + ... + 229717.

It is an arithmetic number, because the mean of its divisors is an integer number (918844).

Almost surely, 2^3215947 is an apocalyptic number.

3215947 is a deficient number, since it is larger than the sum of its proper divisors (459429).

3215947 is an equidigital number, since it uses as much as digits as its factorization.

3215947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459428.

The product of its digits is 7560, while the sum is 31.

The square root of 3215947 is about 1793.3061646021. The cubic root of 3215947 is about 147.6056429812.

The spelling of 3215947 in words is "three million, two hundred fifteen thousand, nine hundred forty-seven".