53857121 has 4 divisors (see below), whose sum is σ = 54615744. Its totient is φ = 53098500.

The previous prime is 53857109. The next prime is 53857127. The reversal of 53857121 is 12175835.

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 53857121 - 2¹⁰ = 53856097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53857127) 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, 379205 + ... + 379346.

It is an arithmetic number, because the mean of its divisors is an integer number (13653936).

Almost surely, 2^53857121 is an apocalyptic number.

It is an amenable number.

53857121 is a deficient number, since it is larger than the sum of its proper divisors (758623).

53857121 is an equidigital number, since it uses as much as digits as its factorization.

53857121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758622.

The product of its digits is 8400, while the sum is 32.

The square root of 53857121 is about 7338.7411045765. The cubic root of 53857121 is about 377.6426570754.

The spelling of 53857121 in words is "fifty-three million, eight hundred fifty-seven thousand, one hundred twenty-one".