2629921 has 4 divisors (see below), whose sum is σ = 3005632. Its totient is φ = 2254212.

The previous prime is 2629909. The next prime is 2629927. The reversal of 2629921 is 1299262.

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: 1299262 = 2 ⋅649631.

It is a cyclic number.

It is not a de Polignac number, because 2629921 - 2⁹ = 2629409 is a prime.

2629921 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2629927) 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, 187845 + ... + 187858.

It is an arithmetic number, because the mean of its divisors is an integer number (751408).

2^2629921 is an apocalyptic number.

It is an amenable number.

2629921 is a deficient number, since it is larger than the sum of its proper divisors (375711).

2629921 is an equidigital number, since it uses as much as digits as its factorization.

2629921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375710.

The product of its digits is 3888, while the sum is 31.

The square root of 2629921 is about 1621.7031170963. The cubic root of 2629921 is about 138.0323560622.

The spelling of 2629921 in words is "two million, six hundred twenty-nine thousand, nine hundred twenty-one".