12901897 has 4 divisors (see below), whose sum is σ = 13346820. Its totient is φ = 12456976.

The previous prime is 12901879. The next prime is 12901913. The reversal of 12901897 is 79810921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79810921 = 97 ⋅822793.

It can be written as a sum of positive squares in 2 ways, for example, as 11095561 + 1806336 = 3331^2 + 1344^2 .

It is a cyclic number.

It is not a de Polignac number, because 12901897 - 2¹⁹ = 12377609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12901297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222418 + ... + 222475.

It is an arithmetic number, because the mean of its divisors is an integer number (3336705).

Almost surely, 2^12901897 is an apocalyptic number.

It is an amenable number.

12901897 is a deficient number, since it is larger than the sum of its proper divisors (444923).

12901897 is an equidigital number, since it uses as much as digits as its factorization.

12901897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444922.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 12901897 is about 3591.9210737431. The cubic root of 12901897 is about 234.5405054878.

The spelling of 12901897 in words is "twelve million, nine hundred one thousand, eight hundred ninety-seven".