7121365 has 8 divisors (see below), whose sum is σ = 8576568. Its totient is φ = 5676480.

The previous prime is 7121357. The next prime is 7121377. The reversal of 7121365 is 5631217.

It can be written as a sum of positive squares in 4 ways, for example, as 3992004 + 3129361 = 1998^2 + 1769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7121365 - 2³ = 7121357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 966 + ... + 3895.

It is an arithmetic number, because the mean of its divisors is an integer number (1072071).

Almost surely, 2^7121365 is an apocalyptic number.

It is an amenable number.

7121365 is a deficient number, since it is larger than the sum of its proper divisors (1455203).

7121365 is a wasteful number, since it uses less digits than its factorization.

7121365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159.

The product of its digits is 1260, while the sum is 25.

The square root of 7121365 is about 2668.5885782563. The cubic root of 7121365 is about 192.3923274848.

The spelling of 7121365 in words is "seven million, one hundred twenty-one thousand, three hundred sixty-five".