7451891 has 2 divisors, whose sum is σ = 7451892. Its totient is φ = 7451890.

The previous prime is 7451879. The next prime is 7451893. The reversal of 7451891 is 1981547.

7451891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1981547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7451891 - 2¹⁰ = 7450867 is a prime.

It is a Sophie Germain prime.

Together with 7451893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7451893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3725945 + 3725946.

It is an arithmetic number, because the mean of its divisors is an integer number (3725946).

Almost surely, 2^7451891 is an apocalyptic number.

7451891 is a deficient number, since it is larger than the sum of its proper divisors (1).

7451891 is an equidigital number, since it uses as much as digits as its factorization.

7451891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 35.

The square root of 7451891 is about 2729.8151952101. The cubic root of 7451891 is about 195.3239498056.

The spelling of 7451891 in words is "seven million, four hundred fifty-one thousand, eight hundred ninety-one".