3945615 has 16 divisors (see below), whose sum is σ = 6684768. Its totient is φ = 1980416.

The previous prime is 3945607. The next prime is 3945631. The reversal of 3945615 is 5165493.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3945615 - 2³ = 3945607 is a prime.

3945615 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7482 + ... + 7991.

It is an arithmetic number, because the mean of its divisors is an integer number (417798).

Almost surely, 2^3945615 is an apocalyptic number.

3945615 is a deficient number, since it is larger than the sum of its proper divisors (2739153).

3945615 is a wasteful number, since it uses less digits than its factorization.

3945615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15498.

The product of its digits is 16200, while the sum is 33.

The square root of 3945615 is about 1986.3572186291. The cubic root of 3945615 is about 158.0173964715.

It can be divided in two parts, 3945 and 615, that added together give a triangular number (4560 = T₉₅).

The spelling of 3945615 in words is "three million, nine hundred forty-five thousand, six hundred fifteen".