2542621 has 2 divisors, whose sum is σ = 2542622. Its totient is φ = 2542620.

The previous prime is 2542619. The next prime is 2542649. The reversal of 2542621 is 1262452.

2542621 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 can be written as a sum of positive squares in only one way, i.e., 2515396 + 27225 = 1586^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 2542621 - 2¹ = 2542619 is a prime.

Together with 2542619, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2542592 and 2542601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2542681) 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, 1271310 + 1271311.

It is an arithmetic number, because the mean of its divisors is an integer number (1271311).

2^2542621 is an apocalyptic number.

It is an amenable number.

2542621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2542621 is an equidigital number, since it uses as much as digits as its factorization.

2542621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 22.

The square root of 2542621 is about 1594.5598138671. The cubic root of 2542621 is about 136.4878134988.

The spelling of 2542621 in words is "two million, five hundred forty-two thousand, six hundred twenty-one".