85206621 has 8 divisors (see below), whose sum is σ = 119588320. Its totient is φ = 53814672.

The previous prime is 85206613. The next prime is 85206661. The reversal of 85206621 is 12660258.

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

It is not a de Polignac number, because 85206621 - 2³ = 85206613 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 (85206661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747370 + ... + 747483.

It is an arithmetic number, because the mean of its divisors is an integer number (14948540).

Almost surely, 2^85206621 is an apocalyptic number.

It is an amenable number.

85206621 is a deficient number, since it is larger than the sum of its proper divisors (34381699).

85206621 is a wasteful number, since it uses less digits than its factorization.

85206621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494875.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 85206621 is about 9230.7432528481. The cubic root of 85206621 is about 440.0389445557.

Adding to 85206621 its reverse (12660258), we get a palindrome (97866879).

The spelling of 85206621 in words is "eighty-five million, two hundred six thousand, six hundred twenty-one".