1304015987 has 4 divisors (see below), whose sum is σ = 1331761056. Its totient is φ = 1276270920.

The previous prime is 1304015953. The next prime is 1304015989. The reversal of 1304015987 is 7895104031.

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

It is a cyclic number.

It is not a de Polignac number, because 1304015987 - 2²⁶ = 1236907123 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 1304015987.

It is not an unprimeable number, because it can be changed into a prime (1304015989) 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, 13872464 + ... + 13872557.

It is an arithmetic number, because the mean of its divisors is an integer number (332940264).

Almost surely, 2^1304015987 is an apocalyptic number.

1304015987 is a deficient number, since it is larger than the sum of its proper divisors (27745069).

1304015987 is an equidigital number, since it uses as much as digits as its factorization.

1304015987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27745068.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1304015987 is about 36111.1615293665. The cubic root of 1304015987 is about 1092.5155789556.

The spelling of 1304015987 in words is "one billion, three hundred four million, fifteen thousand, nine hundred eighty-seven".