1298750422987 has 4 divisors (see below), whose sum is σ = 1328953921240. Its totient is φ = 1268546924736.

The previous prime is 1298750422967. The next prime is 1298750422993. The reversal of 1298750422987 is 7892240578921.

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 1298750422987 - 2²⁷ = 1298616205259 is a prime.

It is a super-2 number, since 2×1298750422987² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1298750422967) 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, 15101749062 + ... + 15101749147.

It is an arithmetic number, because the mean of its divisors is an integer number (332238480310).

Almost surely, 2^{1298750422987} is an apocalyptic number.

1298750422987 is a deficient number, since it is larger than the sum of its proper divisors (30203498253).

1298750422987 is an equidigital number, since it uses as much as digits as its factorization.

1298750422987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30203498252.

The product of its (nonzero) digits is 40642560, while the sum is 64.

The spelling of 1298750422987 in words is "one trillion, two hundred ninety-eight billion, seven hundred fifty million, four hundred twenty-two thousand, nine hundred eighty-seven".