853215457 has 4 divisors (see below), whose sum is σ = 854343316. Its totient is φ = 852087600.

The previous prime is 853215439. The next prime is 853215469. The reversal of 853215457 is 754512358.

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 674752576 + 178462881 = 25976^2 + 13359^2 .

It is a cyclic number.

It is not a de Polignac number, because 853215457 - 2¹¹ = 853213409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (853215437) 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, 562794 + ... + 564307.

It is an arithmetic number, because the mean of its divisors is an integer number (213585829).

Almost surely, 2^853215457 is an apocalyptic number.

It is an amenable number.

853215457 is a deficient number, since it is larger than the sum of its proper divisors (1127859).

853215457 is a wasteful number, since it uses less digits than its factorization.

853215457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127858.

The product of its digits is 168000, while the sum is 40.

The square root of 853215457 is about 29209.8520537164. The cubic root of 853215457 is about 948.4612048590.

The spelling of 853215457 in words is "eight hundred fifty-three million, two hundred fifteen thousand, four hundred fifty-seven".