3402181 has 4 divisors (see below), whose sum is σ = 3424864. Its totient is φ = 3379500.

The previous prime is 3402173. The next prime is 3402211. The reversal of 3402181 is 1812043.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1812043 = 31 ⋅58453.

It is a cyclic number.

It is not a de Polignac number, because 3402181 - 2³ = 3402173 is a prime.

It is a super-2 number, since 2×3402181² = 23149671113522, which contains 22 as substring.

It is the 1845-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3402131) by changing a digit.

It is a nontrivial repunit in base 1844.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11115 + ... + 11416.

It is an arithmetic number, because the mean of its divisors is an integer number (856216).

Almost surely, 2^3402181 is an apocalyptic number.

It is an amenable number.

3402181 is a deficient number, since it is larger than the sum of its proper divisors (22683).

3402181 is a wasteful number, since it uses less digits than its factorization.

3402181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22682.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 3402181 is about 1844.5002033071. The cubic root of 3402181 is about 150.4016052766.

The spelling of 3402181 in words is "three million, four hundred two thousand, one hundred eighty-one".