7045891 has 4 divisors (see below), whose sum is σ = 7217784. Its totient is φ = 6874000.

The previous prime is 7045879. The next prime is 7045901. The reversal of 7045891 is 1985407.

It is a happy number.

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 7045891 - 2⁵ = 7045859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7045391) 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, 85885 + ... + 85966.

It is an arithmetic number, because the mean of its divisors is an integer number (1804446).

Almost surely, 2^7045891 is an apocalyptic number.

7045891 is a deficient number, since it is larger than the sum of its proper divisors (171893).

7045891 is a wasteful number, since it uses less digits than its factorization.

7045891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171892.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 7045891 is about 2654.4097272275. The cubic root of 7045891 is about 191.7102381933.

The spelling of 7045891 in words is "seven million, forty-five thousand, eight hundred ninety-one".