82012261 has 8 divisors (see below), whose sum is σ = 85029120. Its totient is φ = 79008048.

The previous prime is 82012241. The next prime is 82012279. The reversal of 82012261 is 16221028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82012261 - 2⁹ = 82011749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82012211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11220 + ... + 17026.

It is an arithmetic number, because the mean of its divisors is an integer number (10628640).

Almost surely, 2^82012261 is an apocalyptic number.

It is an amenable number.

82012261 is a deficient number, since it is larger than the sum of its proper divisors (3016859).

82012261 is a wasteful number, since it uses less digits than its factorization.

82012261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 82012261 is about 9056.0621133029. The cubic root of 82012261 is about 434.4698010292.

Adding to 82012261 its reverse (16221028), we get a palindrome (98233289).

The spelling of 82012261 in words is "eighty-two million, twelve thousand, two hundred sixty-one".