3949281 has 12 divisors (see below), whose sum is σ = 6519552. Its totient is φ = 2256696.

The previous prime is 3949273. The next prime is 3949291. The reversal of 3949281 is 1829493.

It is not a de Polignac number, because 3949281 - 2³ = 3949273 is a prime.

It is a super-2 number, since 2×3949281² = 31193640833922, which contains 22 as substring.

3949281 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31281 + ... + 31406.

It is an arithmetic number, because the mean of its divisors is an integer number (543296).

Almost surely, 2^3949281 is an apocalyptic number.

It is an amenable number.

3949281 is a deficient number, since it is larger than the sum of its proper divisors (2570271).

3949281 is a wasteful number, since it uses less digits than its factorization.

3949281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62700 (or 62697 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 3949281 is about 1987.2797991224. The cubic root of 3949281 is about 158.0663210333.

The spelling of 3949281 in words is "three million, nine hundred forty-nine thousand, two hundred eighty-one".