1286629 has 2 divisors, whose sum is σ = 1286630. Its totient is φ = 1286628.

The previous prime is 1286617. The next prime is 1286633. The reversal of 1286629 is 9266821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1046529 + 240100 = 1023^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1286629 - 2¹³ = 1278437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1286594 and 1286603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1286669) 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 as a sum of consecutive naturals, namely, 643314 + 643315.

It is an arithmetic number, because the mean of its divisors is an integer number (643315).

2^1286629 is an apocalyptic number.

It is an amenable number.

1286629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286629 is an equidigital number, since it uses as much as digits as its factorization.

1286629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 1286629 is about 1134.2966983995. The cubic root of 1286629 is about 108.7638182115.

The spelling of 1286629 in words is "one million, two hundred eighty-six thousand, six hundred twenty-nine".