85732121 has 4 divisors (see below), whose sum is σ = 85761744. Its totient is φ = 85702500.

The previous prime is 85732103. The next prime is 85732147. The reversal of 85732121 is 12123758.

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 85732121 - 2⁶ = 85732057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85732151) 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, 9935 + ... + 16436.

It is an arithmetic number, because the mean of its divisors is an integer number (21440436).

Almost surely, 2^85732121 is an apocalyptic number.

It is an amenable number.

85732121 is a deficient number, since it is larger than the sum of its proper divisors (29623).

85732121 is a wasteful number, since it uses less digits than its factorization.

85732121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29622.

The product of its digits is 3360, while the sum is 29.

The square root of 85732121 is about 9259.1641631413. The cubic root of 85732121 is about 440.9417175391.

Adding to 85732121 its reverse (12123758), we get a palindrome (97855879).

The spelling of 85732121 in words is "eighty-five million, seven hundred thirty-two thousand, one hundred twenty-one".