7275991 has 4 divisors (see below), whose sum is σ = 7287984. Its totient is φ = 7264000.

The previous prime is 7275977. The next prime is 7276001. The reversal of 7275991 is 1995727.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7275991 - 2⁹ = 7275479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7275911) 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, 5035 + ... + 6316.

It is an arithmetic number, because the mean of its divisors is an integer number (1821996).

Almost surely, 2^7275991 is an apocalyptic number.

7275991 is a deficient number, since it is larger than the sum of its proper divisors (11993).

7275991 is a wasteful number, since it uses less digits than its factorization.

7275991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11992.

The product of its digits is 39690, while the sum is 40.

The square root of 7275991 is about 2697.4044932119. The cubic root of 7275991 is about 193.7748388551.

The spelling of 7275991 in words is "seven million, two hundred seventy-five thousand, nine hundred ninety-one".