84624121 has 4 divisors (see below), whose sum is σ = 84655732. Its totient is φ = 84592512.

The previous prime is 84624097. The next prime is 84624151. The reversal of 84624121 is 12142648.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43086096 + 41538025 = 6564^2 + 6445^2 .

It is a cyclic number.

It is not a de Polignac number, because 84624121 - 2¹⁷ = 84493049 is a prime.

It is a super-2 number, since 2×84624121² = 14322483710045282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84624121.

It is not an unprimeable number, because it can be changed into a prime (84624151) 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, 11376 + ... + 17281.

It is an arithmetic number, because the mean of its divisors is an integer number (21163933).

Almost surely, 2^84624121 is an apocalyptic number.

It is an amenable number.

84624121 is a deficient number, since it is larger than the sum of its proper divisors (31611).

84624121 is a wasteful number, since it uses less digits than its factorization.

84624121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31610.

The product of its digits is 3072, while the sum is 28.

The square root of 84624121 is about 9199.1369703902. The cubic root of 84624121 is about 439.0339013156.

Adding to 84624121 its reverse (12142648), we get a palindrome (96766769).

The spelling of 84624121 in words is "eighty-four million, six hundred twenty-four thousand, one hundred twenty-one".