1290863 has 4 divisors (see below), whose sum is σ = 1475280. Its totient is φ = 1106448.

The previous prime is 1290857. The next prime is 1290869. The reversal of 1290863 is 3680921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3680921 = 173 ⋅21277.

It is an interprime number because it is at equal distance from previous prime (1290857) and next prime (1290869).

It is not a de Polignac number, because 1290863 - 2⁴ = 1290847 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 (1290869) 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 3 ways as a sum of consecutive naturals, for example, 92198 + ... + 92211.

It is an arithmetic number, because the mean of its divisors is an integer number (368820).

2^1290863 is an apocalyptic number.

1290863 is a deficient number, since it is larger than the sum of its proper divisors (184417).

1290863 is an equidigital number, since it uses as much as digits as its factorization.

1290863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184416.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1290863 is about 1136.1615202074. The cubic root of 1290863 is about 108.8829931480.

The spelling of 1290863 in words is "one million, two hundred ninety thousand, eight hundred sixty-three".