1306197 has 6 divisors (see below), whose sum is σ = 1886742. Its totient is φ = 870792.

The previous prime is 1306181. The next prime is 1306213. The reversal of 1306197 is 7916031.

It is an interprime number because it is at equal distance from previous prime (1306181) and next prime (1306213).

It can be written as a sum of positive squares in only one way, i.e., 938961 + 367236 = 969^2 + 606^2 .

It is not a de Polignac number, because 1306197 - 2⁴ = 1306181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1306197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72558 + ... + 72575.

It is an arithmetic number, because the mean of its divisors is an integer number (314457).

2^1306197 is an apocalyptic number.

It is an amenable number.

1306197 is a deficient number, since it is larger than the sum of its proper divisors (580545).

1306197 is a wasteful number, since it uses less digits than its factorization.

1306197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145139 (or 145136 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 1306197 is about 1142.8897584632. The cubic root of 1306197 is about 109.3124330050.

The spelling of 1306197 in words is "one million, three hundred six thousand, one hundred ninety-seven".