3213861 has 12 divisors (see below), whose sum is σ = 4984992. Its totient is φ = 1836408.

The previous prime is 3213853. The next prime is 3213877. The reversal of 3213861 is 1683123.

It is not a de Polignac number, because 3213861 - 2³ = 3213853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213811) 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, 10785 + ... + 11078.

It is an arithmetic number, because the mean of its divisors is an integer number (415416).

Almost surely, 2^3213861 is an apocalyptic number.

It is an amenable number.

3213861 is a deficient number, since it is larger than the sum of its proper divisors (1771131).

3213861 is a wasteful number, since it uses less digits than its factorization.

3213861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21880 (or 21873 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 3213861 is about 1792.7244629334. The cubic root of 3213861 is about 147.5737216457.

Adding to 3213861 its reverse (1683123), we get a palindrome (4896984).

The spelling of 3213861 in words is "three million, two hundred thirteen thousand, eight hundred sixty-one".