1281322 has 16 divisors (see below), whose sum is σ = 2312640. Its totient is φ = 520128.

The previous prime is 1281317. The next prime is 1281331. The reversal of 1281322 is 2231821.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1281322.

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, 2143 + ... + 2674.

It is an arithmetic number, because the mean of its divisors is an integer number (144540).

2^1281322 is an apocalyptic number.

1281322 is a deficient number, since it is larger than the sum of its proper divisors (1031318).

1281322 is a wasteful number, since it uses less digits than its factorization.

1281322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4845.

The product of its digits is 192, while the sum is 19.

The square root of 1281322 is about 1131.9549460999. The cubic root of 1281322 is about 108.6140715950.

The spelling of 1281322 in words is "one million, two hundred eighty-one thousand, three hundred twenty-two".