7121369 has 4 divisors (see below), whose sum is σ = 7218996. Its totient is φ = 7023744.

The previous prime is 7121357. The next prime is 7121377. The reversal of 7121369 is 9631217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9631217 = 421 ⋅22877.

It can be written as a sum of positive squares in 2 ways, for example, as 1537600 + 5583769 = 1240^2 + 2363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7121369 is a prime.

It is a super-2 number, since 2×7121369² = 101427792868322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7121339) 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, 48704 + ... + 48849.

It is an arithmetic number, because the mean of its divisors is an integer number (1804749).

Almost surely, 2^7121369 is an apocalyptic number.

It is an amenable number.

7121369 is a deficient number, since it is larger than the sum of its proper divisors (97627).

7121369 is an equidigital number, since it uses as much as digits as its factorization.

7121369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97626.

The product of its digits is 2268, while the sum is 29.

The square root of 7121369 is about 2668.5893277161. The cubic root of 7121369 is about 192.3923635064.

The spelling of 7121369 in words is "seven million, one hundred twenty-one thousand, three hundred sixty-nine".