3975645 has 16 divisors (see below), whose sum is σ = 6452352. Its totient is φ = 2089920.

The previous prime is 3975599. The next prime is 3975649. The reversal of 3975645 is 5465793.

It is not a de Polignac number, because 3975645 - 2¹² = 3971549 is a prime.

It is a d-powerful number, because it can be written as 3⁴ + 9² + 7⁴ + 5⁹ + 6⁴ + 4⁸ + 5⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3975649) 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, 802 + ... + 2931.

It is an arithmetic number, because the mean of its divisors is an integer number (403272).

Almost surely, 2^3975645 is an apocalyptic number.

It is an amenable number.

3975645 is a deficient number, since it is larger than the sum of its proper divisors (2476707).

3975645 is a wasteful number, since it uses less digits than its factorization.

3975645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3812.

The product of its digits is 113400, while the sum is 39.

The square root of 3975645 is about 1993.9019534571. The cubic root of 3975645 is about 158.4172728205.

The spelling of 3975645 in words is "three million, nine hundred seventy-five thousand, six hundred forty-five".