1286149 has 2 divisors, whose sum is σ = 1286150. Its totient is φ = 1286148.

The previous prime is 1286147. The next prime is 1286177. The reversal of 1286149 is 9416821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 889249 + 396900 = 943^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 1286149 - 2¹ = 1286147 is a prime.

Together with 1286147, it forms a pair of twin primes.

It is a nialpdrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 1286149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1286147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643074 + 643075.

It is an arithmetic number, because the mean of its divisors is an integer number (643075).

2^1286149 is an apocalyptic number.

It is an amenable number.

1286149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286149 is an equidigital number, since it uses as much as digits as its factorization.

1286149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 1286149 is about 1134.0850938091. The cubic root of 1286149 is about 108.7502910989.

The spelling of 1286149 in words is "one million, two hundred eighty-six thousand, one hundred forty-nine".