3213257 has 4 divisors (see below), whose sum is σ = 3230100. Its totient is φ = 3196416.

The previous prime is 3213239. The next prime is 3213269. The reversal of 3213257 is 7523123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7523123 = 269 ⋅27967.

It can be written as a sum of positive squares in 2 ways, for example, as 1628176 + 1585081 = 1276^2 + 1259^2 .

It is a cyclic number.

It is not a de Polignac number, because 3213257 - 2¹⁰ = 3212233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3213277) 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, 8132 + ... + 8517.

It is an arithmetic number, because the mean of its divisors is an integer number (807525).

Almost surely, 2^3213257 is an apocalyptic number.

It is an amenable number.

3213257 is a deficient number, since it is larger than the sum of its proper divisors (16843).

3213257 is a wasteful number, since it uses less digits than its factorization.

3213257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16842.

The product of its digits is 1260, while the sum is 23.

The square root of 3213257 is about 1792.5559963360. Note that the first 3 decimals coincide. The cubic root of 3213257 is about 147.5644762643.

The spelling of 3213257 in words is "three million, two hundred thirteen thousand, two hundred fifty-seven".