1305248087 has 16 divisors (see below), whose sum is σ = 1582909440. Its totient is φ = 1059976800.

The previous prime is 1305248081. The next prime is 1305248089. The reversal of 1305248087 is 7808425031.

It is not a de Polignac number, because 1305248087 - 2¹² = 1305243991 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 1305248087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305248081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142787 + ... + 151652.

It is an arithmetic number, because the mean of its divisors is an integer number (98931840).

Almost surely, 2^1305248087 is an apocalyptic number.

1305248087 is a deficient number, since it is larger than the sum of its proper divisors (277661353).

1305248087 is a wasteful number, since it uses less digits than its factorization.

1305248087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294494.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 1305248087 is about 36128.2173238592. The cubic root of 1305248087 is about 1092.8595585617.

The spelling of 1305248087 in words is "one billion, three hundred five million, two hundred forty-eight thousand, eighty-seven".