2662921 has 2 divisors, whose sum is σ = 2662922. Its totient is φ = 2662920.

The previous prime is 2662903. The next prime is 2662943. The reversal of 2662921 is 1292662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2595321 + 67600 = 1611^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 2662921 - 2¹¹ = 2660873 is a prime.

It is a super-2 number, since 2×2662921² = 14182296504482, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2662921.

It is not a weakly prime, because it can be changed into another prime (2662901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1331460 + 1331461.

It is an arithmetic number, because the mean of its divisors is an integer number (1331461).

2^2662921 is an apocalyptic number.

It is an amenable number.

2662921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2662921 is an equidigital number, since it uses as much as digits as its factorization.

2662921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 2662921 is about 1631.8458873313. The cubic root of 2662921 is about 138.6072969415.

The spelling of 2662921 in words is "two million, six hundred sixty-two thousand, nine hundred twenty-one".