2625641 has 2 divisors, whose sum is σ = 2625642. Its totient is φ = 2625640.

The previous prime is 2625619. The next prime is 2625643. The reversal of 2625641 is 1465262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1371241 + 1254400 = 1171^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2625641 - 2⁶ = 2625577 is a prime.

Together with 2625643, it forms a pair of twin primes.

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 2625641.

It is not a weakly prime, because it can be changed into another prime (2625643) by changing a digit.

It is a nontrivial repunit in base 40.

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, 1312820 + 1312821.

It is an arithmetic number, because the mean of its divisors is an integer number (1312821).

2^2625641 is an apocalyptic number.

It is an amenable number.

2625641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2625641 is an equidigital number, since it uses as much as digits as its factorization.

2625641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 2625641 is about 1620.3829794218. The cubic root of 2625641 is about 137.9574362887.

It can be divided in two parts, 26 and 25641, that multiplied together give a palindrome (666666).

The spelling of 2625641 in words is "two million, six hundred twenty-five thousand, six hundred forty-one".