7280491 has 2 divisors, whose sum is σ = 7280492. Its totient is φ = 7280490.

The previous prime is 7280461. The next prime is 7280503. The reversal of 7280491 is 1940827.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7280491 is a prime.

It is an Ulam number.

7280491 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7280461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3640245 + 3640246.

It is an arithmetic number, because the mean of its divisors is an integer number (3640246).

Almost surely, 2^7280491 is an apocalyptic number.

7280491 is a deficient number, since it is larger than the sum of its proper divisors (1).

7280491 is an equidigital number, since it uses as much as digits as its factorization.

7280491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 7280491 is about 2698.2384994659. The cubic root of 7280491 is about 193.8147787556.

The spelling of 7280491 in words is "seven million, two hundred eighty thousand, four hundred ninety-one".