1321280867 has 4 divisors (see below), whose sum is σ = 1323595416. Its totient is φ = 1318966320.

The previous prime is 1321280809. The next prime is 1321280897. The reversal of 1321280867 is 7680821231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321280867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321280867.

It is not an unprimeable number, because it can be changed into a prime (1321280897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1156418 + ... + 1157559.

It is an arithmetic number, because the mean of its divisors is an integer number (330898854).

Almost surely, 2^1321280867 is an apocalyptic number.

1321280867 is a deficient number, since it is larger than the sum of its proper divisors (2314549).

1321280867 is an equidigital number, since it uses as much as digits as its factorization.

1321280867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314548.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 1321280867 is about 36349.4273269882. The cubic root of 1321280867 is about 1097.3160093044.

The spelling of 1321280867 in words is "one billion, three hundred twenty-one million, two hundred eighty thousand, eight hundred sixty-seven".