82421207 has 6 divisors (see below), whose sum is σ = 90595344. Its totient is φ = 74928260.

The previous prime is 82421197. The next prime is 82421263. The reversal of 82421207 is 70212428.

It is not a de Polignac number, because 82421207 - 2²² = 78226903 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 (82421267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 340463 + ... + 340704.

It is an arithmetic number, because the mean of its divisors is an integer number (15099224).

Almost surely, 2^82421207 is an apocalyptic number.

82421207 is a deficient number, since it is larger than the sum of its proper divisors (8174137).

82421207 is a wasteful number, since it uses less digits than its factorization.

82421207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681189 (or 681178 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 82421207 is about 9078.6126142710. The cubic root of 82421207 is about 435.1907508864.

It can be divided in two parts, 82421 and 207, that added together give a palindrome (82628).

The spelling of 82421207 in words is "eighty-two million, four hundred twenty-one thousand, two hundred seven".