785745121 has 4 divisors (see below), whose sum is σ = 897994432. Its totient is φ = 673495812.

The previous prime is 785745119. The next prime is 785745131. The reversal of 785745121 is 121547587.

785745121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 785745121 - 2¹ = 785745119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (785745101) 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, 56124645 + ... + 56124658.

It is an arithmetic number, because the mean of its divisors is an integer number (224498608).

Almost surely, 2^785745121 is an apocalyptic number.

It is an amenable number.

785745121 is a deficient number, since it is larger than the sum of its proper divisors (112249311).

785745121 is a wasteful number, since it uses less digits than its factorization.

785745121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112249310.

The product of its digits is 78400, while the sum is 40.

The square root of 785745121 is about 28031.1455527597. The cubic root of 785745121 is about 922.7709154541.

The spelling of 785745121 in words is "seven hundred eighty-five million, seven hundred forty-five thousand, one hundred twenty-one".