7421165 has 4 divisors (see below), whose sum is σ = 8905404. Its totient is φ = 5936928.

The previous prime is 7421143. The next prime is 7421173. The reversal of 7421165 is 5611247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5611247 = 433 ⋅12959.

It can be written as a sum of positive squares in 2 ways, for example, as 2390116 + 5031049 = 1546^2 + 2243^2 .

It is a cyclic number.

It is not a de Polignac number, because 7421165 - 2⁶ = 7421101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742112 + ... + 742121.

It is an arithmetic number, because the mean of its divisors is an integer number (2226351).

Almost surely, 2^7421165 is an apocalyptic number.

It is an amenable number.

7421165 is a deficient number, since it is larger than the sum of its proper divisors (1484239).

7421165 is a wasteful number, since it uses less digits than its factorization.

7421165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484238.

The product of its digits is 1680, while the sum is 26.

The square root of 7421165 is about 2724.1815284595. The cubic root of 7421165 is about 195.0551235788.

The spelling of 7421165 in words is "seven million, four hundred twenty-one thousand, one hundred sixty-five".