82144121 has 4 divisors (see below), whose sum is σ = 83184000. Its totient is φ = 81104244.

The previous prime is 82144099. The next prime is 82144133. The reversal of 82144121 is 12144128.

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 not a de Polignac number, because 82144121 - 2¹⁴ = 82127737 is a prime.

It is a super-2 number, since 2×82144121² = 13495313229725282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82144171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519821 + ... + 519978.

It is an arithmetic number, because the mean of its divisors is an integer number (20796000).

Almost surely, 2^82144121 is an apocalyptic number.

It is an amenable number.

82144121 is a deficient number, since it is larger than the sum of its proper divisors (1039879).

82144121 is a wasteful number, since it uses less digits than its factorization.

82144121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039878.

The product of its digits is 512, while the sum is 23.

The square root of 82144121 is about 9063.3393956091. The cubic root of 82144121 is about 434.7025244103.

Adding to 82144121 its reverse (12144128), we get a palindrome (94288249).

The spelling of 82144121 in words is "eighty-two million, one hundred forty-four thousand, one hundred twenty-one".