1000247421895 has 4 divisors (see below), whose sum is σ = 1200296906280. Its totient is φ = 800197937512.

The previous prime is 1000247421857. The next prime is 1000247421923. The reversal of 1000247421895 is 5981247420001.

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 1000247421895 - 2²⁵ = 1000213867463 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100024742185 + ... + 100024742194.

It is an arithmetic number, because the mean of its divisors is an integer number (300074226570).

Almost surely, 2^{1000247421895} is an apocalyptic number.

1000247421895 is a deficient number, since it is larger than the sum of its proper divisors (200049484385).

1000247421895 is an equidigital number, since it uses as much as digits as its factorization.

1000247421895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200049484384.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 1000247421895 in words is "one trillion, two hundred forty-seven million, four hundred twenty-one thousand, eight hundred ninety-five".