7162121 has 4 divisors (see below), whose sum is σ = 7167744. Its totient is φ = 7156500.

The previous prime is 7162109. The next prime is 7162171. The reversal of 7162121 is 1212617.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7162121 - 2¹⁴ = 7145737 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7162093 and 7162102.

It is not an unprimeable number, because it can be changed into a prime (7162171) 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, 116 + ... + 3786.

It is an arithmetic number, because the mean of its divisors is an integer number (1791936).

Almost surely, 2^7162121 is an apocalyptic number.

It is an amenable number.

7162121 is a deficient number, since it is larger than the sum of its proper divisors (5623).

7162121 is a wasteful number, since it uses less digits than its factorization.

7162121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5622.

The product of its digits is 168, while the sum is 20.

The square root of 7162121 is about 2676.2139301633. The cubic root of 7162121 is about 192.7586538205.

Adding to 7162121 its reverse (1212617), we get a palindrome (8374738).

The spelling of 7162121 in words is "seven million, one hundred sixty-two thousand, one hundred twenty-one".