1321248087 has 36 divisors (see below), whose sum is σ = 2101894704. Its totient is φ = 798145920.

The previous prime is 1321248031. The next prime is 1321248121. The reversal of 1321248087 is 7808421231.

It is not a de Polignac number, because 1321248087 - 2⁸ = 1321247831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321248287) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 65887 + ... + 83567.

It is an arithmetic number, because the mean of its divisors is an integer number (58385964).

Almost surely, 2^1321248087 is an apocalyptic number.

1321248087 is a deficient number, since it is larger than the sum of its proper divisors (780646617).

1321248087 is a wasteful number, since it uses less digits than its factorization.

1321248087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17748 (or 17726 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1321248087 is about 36348.9764230026. The cubic root of 1321248087 is about 1097.3069346968.

The spelling of 1321248087 in words is "one billion, three hundred twenty-one million, two hundred forty-eight thousand, eighty-seven".