12202991 has 8 divisors (see below), whose sum is σ = 12952944. Its totient is φ = 11456640.

The previous prime is 12202979. The next prime is 12203003. The reversal of 12202991 is 19920221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12202979) and next prime (12203003).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12202991 - 2¹⁴ = 12186607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12202991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12202961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9836 + ... + 11006.

It is an arithmetic number, because the mean of its divisors is an integer number (1619118).

Almost surely, 2^12202991 is an apocalyptic number.

12202991 is a deficient number, since it is larger than the sum of its proper divisors (749953).

12202991 is a wasteful number, since it uses less digits than its factorization.

12202991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12202991 is about 3493.2779734799. The cubic root of 12202991 is about 230.2265631385.

The spelling of 12202991 in words is "twelve million, two hundred two thousand, nine hundred ninety-one".