3945519 has 6 divisors (see below), whose sum is σ = 5699096. Its totient is φ = 2630340.

The previous prime is 3945467. The next prime is 3945527. The reversal of 3945519 is 9155493.

It is not a de Polignac number, because 3945519 - 2⁷ = 3945391 is a prime.

It is a super-2 number, since 2×3945519² = 31134240358722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 219187 + ... + 219204.

Almost surely, 2^3945519 is an apocalyptic number.

3945519 is a deficient number, since it is larger than the sum of its proper divisors (1753577).

3945519 is a wasteful number, since it uses less digits than its factorization.

3945519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438397 (or 438394 counting only the distinct ones).

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

The square root of 3945519 is about 1986.3330536443. Note that the first 3 decimals coincide. The cubic root of 3945519 is about 158.0161148975.

The spelling of 3945519 in words is "three million, nine hundred forty-five thousand, five hundred nineteen".