82612261 has 2 divisors, whose sum is σ = 82612262. Its totient is φ = 82612260.

The previous prime is 82612249. The next prime is 82612267. The reversal of 82612261 is 16221628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78588225 + 4024036 = 8865^2 + 2006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82612261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82612267) 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, 41306130 + 41306131.

It is an arithmetic number, because the mean of its divisors is an integer number (41306131).

Almost surely, 2^82612261 is an apocalyptic number.

It is an amenable number.

82612261 is a deficient number, since it is larger than the sum of its proper divisors (1).

82612261 is an equidigital number, since it uses as much as digits as its factorization.

82612261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 82612261 is about 9089.1287261211. The cubic root of 82612261 is about 435.5267516783.

Adding to 82612261 its reverse (16221628), we get a palindrome (98833889).

The spelling of 82612261 in words is "eighty-two million, six hundred twelve thousand, two hundred sixty-one".