1298506370087 has 4 divisors (see below), whose sum is σ = 1306472667000. Its totient is φ = 1290540073176.

The previous prime is 1298506370081. The next prime is 1298506370111. The reversal of 1298506370087 is 7800736058921.

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 1298506370087 - 2⁴ = 1298506370071 is a prime.

It is a super-2 number, since 2×1298506370087² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298506370081) 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, 3983148212 + ... + 3983148537.

It is an arithmetic number, because the mean of its divisors is an integer number (326618166750).

Almost surely, 2^{1298506370087} is an apocalyptic number.

1298506370087 is a deficient number, since it is larger than the sum of its proper divisors (7966296913).

1298506370087 is an equidigital number, since it uses as much as digits as its factorization.

1298506370087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7966296912.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 1298506370087 in words is "one trillion, two hundred ninety-eight billion, five hundred six million, three hundred seventy thousand, eighty-seven".