1281197 has 4 divisors (see below), whose sum is σ = 1285056. Its totient is φ = 1277340.

The previous prime is 1281193. The next prime is 1281211. The reversal of 1281197 is 7911821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7911821 = 37 ⋅213833.

It is a cyclic number.

It is not a de Polignac number, because 1281197 - 2² = 1281193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281193) 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, 1379 + ... + 2112.

It is an arithmetic number, because the mean of its divisors is an integer number (321264).

2^1281197 is an apocalyptic number.

It is an amenable number.

1281197 is a deficient number, since it is larger than the sum of its proper divisors (3859).

1281197 is an equidigital number, since it uses as much as digits as its factorization.

1281197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3858.

The product of its digits is 1008, while the sum is 29.

The square root of 1281197 is about 1131.8997305415. The cubic root of 1281197 is about 108.6105395137.

The spelling of 1281197 in words is "one million, two hundred eighty-one thousand, one hundred ninety-seven".