9420857 has 4 divisors (see below), whose sum is σ = 9650676. Its totient is φ = 9191040.

The previous prime is 9420841. The next prime is 9420863. The reversal of 9420857 is 7580249.

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 246016 + 9174841 = 496^2 + 3029^2 .

It is a cyclic number.

It is not a de Polignac number, because 9420857 - 2⁴ = 9420841 is a prime.

It is a super-2 number, since 2×9420857² = 177505093228898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9420877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114848 + ... + 114929.

It is an arithmetic number, because the mean of its divisors is an integer number (2412669).

Almost surely, 2^9420857 is an apocalyptic number.

It is an amenable number.

9420857 is a deficient number, since it is larger than the sum of its proper divisors (229819).

9420857 is a wasteful number, since it uses less digits than its factorization.

9420857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229818.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 9420857 is about 3069.3414603136. The cubic root of 9420857 is about 211.2014054395.

The spelling of 9420857 in words is "nine million, four hundred twenty thousand, eight hundred fifty-seven".