12229591 has 12 divisors (see below), whose sum is σ = 13703256. Its totient is φ = 10902320.

The previous prime is 12229589. The next prime is 12229601. The reversal of 12229591 is 19592221.

It is not a de Polignac number, because 12229591 - 2¹ = 12229589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12229571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5460 + ... + 7366.

It is an arithmetic number, because the mean of its divisors is an integer number (1141938).

Almost surely, 2^12229591 is an apocalyptic number.

12229591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12229591 is a deficient number, since it is larger than the sum of its proper divisors (1473665).

12229591 is a wasteful number, since it uses less digits than its factorization.

12229591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982 (or 1971 counting only the distinct ones).

The product of its digits is 3240, while the sum is 31.

The square root of 12229591 is about 3497.0832131935. The cubic root of 12229591 is about 230.3937238577.

The spelling of 12229591 in words is "twelve million, two hundred twenty-nine thousand, five hundred ninety-one".