2667421 has 4 divisors (see below), whose sum is σ = 2670844. Its totient is φ = 2664000.

The previous prime is 2667383. The next prime is 2667433. The reversal of 2667421 is 1247662.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 622521 + 2044900 = 789^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2667421 - 2¹¹ = 2665373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2667421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2667451) 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, 91 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (667711).

2^2667421 is an apocalyptic number.

It is an amenable number.

2667421 is a deficient number, since it is larger than the sum of its proper divisors (3423).

2667421 is a wasteful number, since it uses less digits than its factorization.

2667421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422.

The product of its digits is 4032, while the sum is 28.

The square root of 2667421 is about 1633.2241119944. The cubic root of 2667421 is about 138.6853292754.

The spelling of 2667421 in words is "two million, six hundred sixty-seven thousand, four hundred twenty-one".