1291963 has 2 divisors, whose sum is σ = 1291964. Its totient is φ = 1291962.

The previous prime is 1291957. The next prime is 1291967. The reversal of 1291963 is 3691921.

It is a strong prime.

It is an emirp because it is prime and its reverse (3691921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1291963 - 2⁵ = 1291931 is a prime.

It is a d-powerful number, because it can be written as 1 + 2¹⁹ + 9⁵ + 1 + 9⁶ + 6² + 3¹¹ .

It is not a weakly prime, because it can be changed into another prime (1291967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645981 + 645982.

It is an arithmetic number, because the mean of its divisors is an integer number (645982).

2^1291963 is an apocalyptic number.

1291963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291963 is an equidigital number, since it uses as much as digits as its factorization.

1291963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 31.

The square root of 1291963 is about 1136.6455032243. The cubic root of 1291963 is about 108.9139123310.

The spelling of 1291963 in words is "one million, two hundred ninety-one thousand, nine hundred sixty-three".