2858621 has 2 divisors, whose sum is σ = 2858622. Its totient is φ = 2858620.

The previous prime is 2858599. The next prime is 2858623. The reversal of 2858621 is 1268582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1452025 + 1406596 = 1205^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 2858621 - 2¹⁴ = 2842237 is a prime.

Together with 2858623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2858623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1429310 + 1429311.

It is an arithmetic number, because the mean of its divisors is an integer number (1429311).

2^2858621 is an apocalyptic number.

It is an amenable number.

2858621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2858621 is an equidigital number, since it uses as much as digits as its factorization.

2858621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 32.

The square root of 2858621 is about 1690.7456934737. The cubic root of 2858621 is about 141.9228073473.

The spelling of 2858621 in words is "two million, eight hundred fifty-eight thousand, six hundred twenty-one".