3994515 has 40 divisors (see below), whose sum is σ = 8189280. Its totient is φ = 1824768.

The previous prime is 3994513. The next prime is 3994537. The reversal of 3994515 is 5154993.

It is not a de Polignac number, because 3994515 - 2¹ = 3994513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3994515.

It is not an unprimeable number, because it can be changed into a prime (3994513) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2131 + ... + 3539.

It is an arithmetic number, because the mean of its divisors is an integer number (204732).

Almost surely, 2^3994515 is an apocalyptic number.

3994515 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3994515 is an abundant number, since it is smaller than the sum of its proper divisors (4194765).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3994515 is a wasteful number, since it uses less digits than its factorization.

3994515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433 (or 1424 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 3994515 is about 1998.6282795958. The cubic root of 3994515 is about 158.6675145503.

Adding to 3994515 its sum of digits (36), we get a triangular number (3994551 = T₂₈₂₆).

The spelling of 3994515 in words is "three million, nine hundred ninety-four thousand, five hundred fifteen".