3291381 has 16 divisors (see below), whose sum is σ = 4916800. Its totient is φ = 2175984.

The previous prime is 3291373. The next prime is 3291383. The reversal of 3291381 is 1831923.

It is not a de Polignac number, because 3291381 - 2³ = 3291373 is a prime.

It is a super-2 number, since 2×3291381² = 21666377774322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3291383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3315 + ... + 4191.

It is an arithmetic number, because the mean of its divisors is an integer number (307300).

Almost surely, 2^3291381 is an apocalyptic number.

It is an amenable number.

3291381 is a deficient number, since it is larger than the sum of its proper divisors (1625419).

3291381 is a wasteful number, since it uses less digits than its factorization.

3291381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025 (or 1019 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 3291381 is about 1814.2163597543. The cubic root of 3291381 is about 148.7508259729.

The spelling of 3291381 in words is "three million, two hundred ninety-one thousand, three hundred eighty-one".