2621951 has 2 divisors, whose sum is σ = 2621952. Its totient is φ = 2621950.

The previous prime is 2621947. The next prime is 2621987. The reversal of 2621951 is 1591262.

2621951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2621951 - 2² = 2621947 is a prime.

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 2621951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2621921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310975 + 1310976.

It is an arithmetic number, because the mean of its divisors is an integer number (1310976).

2^2621951 is an apocalyptic number.

2621951 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621951 is an equidigital number, since it uses as much as digits as its factorization.

2621951 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2621951 is about 1619.2439593835. The cubic root of 2621951 is about 137.8927788583.

The spelling of 2621951 in words is "two million, six hundred twenty-one thousand, nine hundred fifty-one".