1288634 has 16 divisors (see below), whose sum is σ = 2068416. Its totient is φ = 600000.

The previous prime is 1288613. The next prime is 1288643. The reversal of 1288634 is 4368821.

It is a self number, because there is not a number n which added to its sum of digits gives 1288634.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5009 + ... + 5259.

It is an arithmetic number, because the mean of its divisors is an integer number (129276).

2^1288634 is an apocalyptic number.

1288634 is a deficient number, since it is larger than the sum of its proper divisors (779782).

1288634 is a wasteful number, since it uses less digits than its factorization.

1288634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421.

The product of its digits is 9216, while the sum is 32.

The square root of 1288634 is about 1135.1801619126. The cubic root of 1288634 is about 108.8202857396.

The spelling of 1288634 in words is "one million, two hundred eighty-eight thousand, six hundred thirty-four".