785225021 has 8 divisors (see below), whose sum is σ = 918270144. Its totient is φ = 657397440.

The previous prime is 785224987. The next prime is 785225047. The reversal of 785225021 is 120522587.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-785225021 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 (785225081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1304060 + ... + 1304661.

It is an arithmetic number, because the mean of its divisors is an integer number (114783768).

Almost surely, 2^785225021 is an apocalyptic number.

It is an amenable number.

785225021 is a deficient number, since it is larger than the sum of its proper divisors (133045123).

785225021 is a wasteful number, since it uses less digits than its factorization.

785225021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608771.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 785225021 is about 28021.8668364547. The cubic root of 785225021 is about 922.5672705012.

The spelling of 785225021 in words is "seven hundred eighty-five million, two hundred twenty-five thousand, twenty-one".