1321882987 has 8 divisors (see below), whose sum is σ = 1330476032. Its totient is φ = 1313317800.

The previous prime is 1321882963. The next prime is 1321883027. The reversal of 1321882987 is 7892881231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321882987 - 2²³ = 1313494379 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 1321882987.

It is not an unprimeable number, because it can be changed into a prime (1321882087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92812 + ... + 106102.

It is an arithmetic number, because the mean of its divisors is an integer number (166309504).

Almost surely, 2^1321882987 is an apocalyptic number.

1321882987 is a deficient number, since it is larger than the sum of its proper divisors (8593045).

1321882987 is a wasteful number, since it uses less digits than its factorization.

1321882987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13929.

The product of its digits is 387072, while the sum is 49.

The square root of 1321882987 is about 36357.7087699431. The cubic root of 1321882987 is about 1097.4826697000.

The spelling of 1321882987 in words is "one billion, three hundred twenty-one million, eight hundred eighty-two thousand, nine hundred eighty-seven".