53724121 has 6 divisors (see below), whose sum is σ = 59052266. Its totient is φ = 48840000.

The previous prime is 53724107. The next prime is 53724127. The reversal of 53724121 is 12142735.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40144896 + 13579225 = 6336^2 + 3685^2 .

It is not a de Polignac number, because 53724121 - 2⁵ = 53724089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53724127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221880 + ... + 222121.

Almost surely, 2^53724121 is an apocalyptic number.

It is an amenable number.

53724121 is a deficient number, since it is larger than the sum of its proper divisors (5328145).

53724121 is a wasteful number, since it uses less digits than its factorization.

53724121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444023 (or 444012 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 53724121 is about 7329.6740036648. The cubic root of 53724121 is about 377.3315383599.

Adding to 53724121 its reverse (12142735), we get a palindrome (65866856).

The spelling of 53724121 in words is "fifty-three million, seven hundred twenty-four thousand, one hundred twenty-one".