1288862 has 4 divisors (see below), whose sum is σ = 1933296. Its totient is φ = 644430.

The previous prime is 1288853. The next prime is 1288871. The reversal of 1288862 is 2688821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2688821 = 41 ⋅65581.

It is an interprime number because it is at equal distance from previous prime (1288853) and next prime (1288871).

It is a super-2 number, since 2×1288862² = 3322330510088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322214 + ... + 322217.

It is an arithmetic number, because the mean of its divisors is an integer number (483324).

2^1288862 is an apocalyptic number.

1288862 is a deficient number, since it is larger than the sum of its proper divisors (644434).

1288862 is an equidigital number, since it uses as much as digits as its factorization.

1288862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644433.

The product of its digits is 12288, while the sum is 35.

The square root of 1288862 is about 1135.2805820589. The cubic root of 1288862 is about 108.8267032747.

The spelling of 1288862 in words is "one million, two hundred eighty-eight thousand, eight hundred sixty-two".