2684421 has 12 divisors (see below), whose sum is σ = 4021472. Its totient is φ = 1789452.

The previous prime is 2684401. The next prime is 2684431. The reversal of 2684421 is 1244862.

It is not a de Polignac number, because 2684421 - 2⁵ = 2684389 is a prime.

It is a super-2 number, since 2×2684421² = 14412232210482, 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (2684401) 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, 5281 + ... + 5766.

2^2684421 is an apocalyptic number.

It is an amenable number.

2684421 is a deficient number, since it is larger than the sum of its proper divisors (1337051).

2684421 is an equidigital number, since it uses as much as digits as its factorization.

2684421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11062 (or 11050 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 2684421 is about 1638.4202757534. The cubic root of 2684421 is about 138.9793285686.

The spelling of 2684421 in words is "two million, six hundred eighty-four thousand, four hundred twenty-one".