2651921 has 8 divisors (see below), whose sum is σ = 2757888. Its totient is φ = 2548000.

The previous prime is 2651911. The next prime is 2651947. The reversal of 2651921 is 1291562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2651921 - 2¹⁰ = 2650897 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2651911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2456 + ... + 3366.

It is an arithmetic number, because the mean of its divisors is an integer number (344736).

2^2651921 is an apocalyptic number.

It is an amenable number.

2651921 is a deficient number, since it is larger than the sum of its proper divisors (105967).

2651921 is an equidigital number, since it uses as much as digits as its factorization.

2651921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023.

The product of its digits is 1080, while the sum is 26.

The square root of 2651921 is about 1628.4719831793. The cubic root of 2651921 is about 138.4161804342.

The spelling of 2651921 in words is "two million, six hundred fifty-one thousand, nine hundred twenty-one".