11428591 has 2 divisors, whose sum is σ = 11428592. Its totient is φ = 11428590.

The previous prime is 11428559. The next prime is 11428601. The reversal of 11428591 is 19582411.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19582411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11428591 - 2⁵ = 11428559 is a prime.

It is a super-2 number, since 2×11428591² = 261225384490562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11428511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5714295 + 5714296.

It is an arithmetic number, because the mean of its divisors is an integer number (5714296).

Almost surely, 2^11428591 is an apocalyptic number.

11428591 is a deficient number, since it is larger than the sum of its proper divisors (1).

11428591 is an equidigital number, since it uses as much as digits as its factorization.

11428591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 31.

The square root of 11428591 is about 3380.6199135661. The cubic root of 11428591 is about 225.2497046686.

The spelling of 11428591 in words is "eleven million, four hundred twenty-eight thousand, five hundred ninety-one".