2621617 has 2 divisors, whose sum is σ = 2621618. Its totient is φ = 2621616.

The previous prime is 2621611. The next prime is 2621669. The reversal of 2621617 is 7161262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2217121 + 404496 = 1489^2 + 636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2621617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2621591 and 2621600.

It is not a weakly prime, because it can be changed into another prime (2621611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310808 + 1310809.

It is an arithmetic number, because the mean of its divisors is an integer number (1310809).

2^2621617 is an apocalyptic number.

It is an amenable number.

2621617 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621617 is an equidigital number, since it uses as much as digits as its factorization.

2621617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 2621617 is about 1619.1408215470. The cubic root of 2621617 is about 137.8869234039.

Adding to 2621617 its reverse (7161262), we get a palindrome (9782879).

The spelling of 2621617 in words is "two million, six hundred twenty-one thousand, six hundred seventeen".