3251665 has 8 divisors (see below), whose sum is σ = 3924648. Its totient is φ = 2586240.

The previous prime is 3251663. The next prime is 3251681. The reversal of 3251665 is 5661523.

It can be written as a sum of positive squares in 4 ways, for example, as 40401 + 3211264 = 201^2 + 1792^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3251665 - 2¹ = 3251663 is a prime.

It is a Duffinian number.

3251665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3251663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 892 + ... + 2701.

It is an arithmetic number, because the mean of its divisors is an integer number (490581).

Almost surely, 2^3251665 is an apocalyptic number.

It is an amenable number.

3251665 is a deficient number, since it is larger than the sum of its proper divisors (672983).

3251665 is a wasteful number, since it uses less digits than its factorization.

3251665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779.

The product of its digits is 5400, while the sum is 28.

The square root of 3251665 is about 1803.2373665161. The cubic root of 3251665 is about 148.1500942607.

It can be divided in two parts, 3251 and 665, that added together give a triangular number (3916 = T₈₈).

The spelling of 3251665 in words is "three million, two hundred fifty-one thousand, six hundred sixty-five".