3945515 has 16 divisors (see below), whose sum is σ = 5456640. Its totient is φ = 2682720.

The previous prime is 3945467. The next prime is 3945527. The reversal of 3945515 is 5155493.

3945515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3945515 - 2¹⁴ = 3929131 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4460 + ... + 5270.

It is an arithmetic number, because the mean of its divisors is an integer number (341040).

Almost surely, 2^3945515 is an apocalyptic number.

3945515 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3945515 is the 1622-nd pentagonal number.

3945515 is a deficient number, since it is larger than the sum of its proper divisors (1511125).

3945515 is a wasteful number, since it uses less digits than its factorization.

3945515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962.

The product of its digits is 13500, while the sum is 32.

The square root of 3945515 is about 1986.3320467636. The cubic root of 3945515 is about 158.0160614981.

It can be divided in two parts, 39 and 45515, that added together give a palindrome (45554).

The spelling of 3945515 in words is "three million, nine hundred forty-five thousand, five hundred fifteen".