3257645 has 16 divisors (see below), whose sum is σ = 4199040. Its totient is φ = 2418624.

The previous prime is 3257641. The next prime is 3257663. The reversal of 3257645 is 5467523.

It is not a de Polignac number, because 3257645 - 2² = 3257641 is a prime.

It is a super-3 number, since 3×3257645³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3257641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4712 + ... + 5358.

It is an arithmetic number, because the mean of its divisors is an integer number (262440).

Almost surely, 2^3257645 is an apocalyptic number.

It is an amenable number.

3257645 is a deficient number, since it is larger than the sum of its proper divisors (941395).

3257645 is a wasteful number, since it uses less digits than its factorization.

3257645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its digits is 25200, while the sum is 32.

The square root of 3257645 is about 1804.8947337726. The cubic root of 3257645 is about 148.2408575077.

The spelling of 3257645 in words is "three million, two hundred fifty-seven thousand, six hundred forty-five".