82604261 has 2 divisors, whose sum is σ = 82604262. Its totient is φ = 82604260.

The previous prime is 82604257. The next prime is 82604273. The reversal of 82604261 is 16240628.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56400100 + 26204161 = 7510^2 + 5119^2 .

It is a cyclic number.

It is not a de Polignac number, because 82604261 - 2² = 82604257 is a prime.

It is a super-2 number, since 2×82604261² = 13646927870712242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82600261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41302130 + 41302131.

It is an arithmetic number, because the mean of its divisors is an integer number (41302131).

Almost surely, 2^82604261 is an apocalyptic number.

It is an amenable number.

82604261 is a deficient number, since it is larger than the sum of its proper divisors (1).

82604261 is an equidigital number, since it uses as much as digits as its factorization.

82604261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 82604261 is about 9088.6886292798. The cubic root of 82604261 is about 435.5126927221.

Adding to 82604261 its reverse (16240628), we get a palindrome (98844889).

It can be divided in two parts, 8260 and 4261, that added together give a palindrome (12521).

The spelling of 82604261 in words is "eighty-two million, six hundred four thousand, two hundred sixty-one".