12197851 has 2 divisors, whose sum is σ = 12197852. Its totient is φ = 12197850.

The previous prime is 12197839. The next prime is 12197879. The reversal of 12197851 is 15879121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12197851 - 2⁷ = 12197723 is a prime.

It is not a weakly prime, because it can be changed into another prime (12197821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6098925 + 6098926.

It is an arithmetic number, because the mean of its divisors is an integer number (6098926).

Almost surely, 2^12197851 is an apocalyptic number.

12197851 is a deficient number, since it is larger than the sum of its proper divisors (1).

12197851 is an equidigital number, since it uses as much as digits as its factorization.

12197851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 34.

The square root of 12197851 is about 3492.5421973113. The cubic root of 12197851 is about 230.1942341595.

The spelling of 12197851 in words is "twelve million, one hundred ninety-seven thousand, eight hundred fifty-one".