86821245 has 24 divisors (see below), whose sum is σ = 171989376. Its totient is φ = 39689568.

The previous prime is 86821223. The next prime is 86821247. The reversal of 86821245 is 54212868.

It is not a de Polignac number, because 86821245 - 2⁶ = 86821181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86821247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137497 + ... + 138126.

It is an arithmetic number, because the mean of its divisors is an integer number (7166224).

Almost surely, 2^86821245 is an apocalyptic number.

It is an amenable number.

86821245 is a deficient number, since it is larger than the sum of its proper divisors (85168131).

86821245 is a wasteful number, since it uses less digits than its factorization.

86821245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275641 (or 275638 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 86821245 is about 9317.7918521504. The cubic root of 86821245 is about 442.8010782552.

The spelling of 86821245 in words is "eighty-six million, eight hundred twenty-one thousand, two hundred forty-five".