2956621 has 2 divisors, whose sum is σ = 2956622. Its totient is φ = 2956620.

The previous prime is 2956561. The next prime is 2956631. The reversal of 2956621 is 1266592.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1550025 + 1406596 = 1245^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 2956621 - 2⁷ = 2956493 is a prime.

2956621 is a lucky number.

It is equal to p₂₁₃₈₈₉ and since 2956621 and 213889 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2956631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1478310 + 1478311.

It is an arithmetic number, because the mean of its divisors is an integer number (1478311).

2^2956621 is an apocalyptic number.

It is an amenable number.

2956621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2956621 is an equidigital number, since it uses as much as digits as its factorization.

2956621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 2956621 is about 1719.4827710681. The cubic root of 2956621 is about 143.5264310478.

The spelling of 2956621 in words is "two million, nine hundred fifty-six thousand, six hundred twenty-one".