3405281 has 4 divisors (see below), whose sum is σ = 3714864. Its totient is φ = 3095700.

The previous prime is 3405277. The next prime is 3405289. The reversal of 3405281 is 1825043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3405281 - 2² = 3405277 is a prime.

It is a super-2 number, since 2×3405281² = 23191877377922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3405289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154775 + ... + 154796.

It is an arithmetic number, because the mean of its divisors is an integer number (928716).

Almost surely, 2^3405281 is an apocalyptic number.

It is an amenable number.

3405281 is a deficient number, since it is larger than the sum of its proper divisors (309583).

3405281 is a wasteful number, since it uses less digits than its factorization.

3405281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309582.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 3405281 is about 1845.3403480117. The cubic root of 3405281 is about 150.4472723978.

The spelling of 3405281 in words is "three million, four hundred five thousand, two hundred eighty-one".