84290521 has 4 divisors (see below), whose sum is σ = 96332032. Its totient is φ = 72249012.

The previous prime is 84290467. The next prime is 84290537. The reversal of 84290521 is 12509248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84290521 - 2¹⁵ = 84257753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84291521) 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 3 ways as a sum of consecutive naturals, for example, 6020745 + ... + 6020758.

It is an arithmetic number, because the mean of its divisors is an integer number (24083008).

Almost surely, 2^84290521 is an apocalyptic number.

It is an amenable number.

84290521 is a deficient number, since it is larger than the sum of its proper divisors (12041511).

84290521 is a wasteful number, since it uses less digits than its factorization.

84290521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12041510.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 84290521 is about 9180.9869295191. The cubic root of 84290521 is about 438.4562307579.

Adding to 84290521 its reverse (12509248), we get a palindrome (96799769).

The spelling of 84290521 in words is "eighty-four million, two hundred ninety thousand, five hundred twenty-one".