785000285021 has 4 divisors (see below), whose sum is σ = 785196490044. Its totient is φ = 784804080000.

The previous prime is 785000284931. The next prime is 785000285033. The reversal of 785000285021 is 120582000587.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 132154060900 + 652846224121 = 363530^2 + 807989^2 .

It is a cyclic number.

It is not a de Polignac number, because 785000285021 - 2¹⁰ = 785000283997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (785000285081) 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, 98096510 + ... + 98104511.

It is an arithmetic number, because the mean of its divisors is an integer number (196299122511).

Almost surely, 2^785000285021 is an apocalyptic number.

It is an amenable number.

785000285021 is a deficient number, since it is larger than the sum of its proper divisors (196205023).

785000285021 is a wasteful number, since it uses less digits than its factorization.

785000285021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196205022.

The product of its (nonzero) digits is 44800, while the sum is 38.

The spelling of 785000285021 in words is "seven hundred eighty-five billion, two hundred eighty-five thousand, twenty-one".