52406421 has 8 divisors (see below), whose sum is σ = 70181280. Its totient is φ = 34784592.

The previous prime is 52406401. The next prime is 52406447. The reversal of 52406421 is 12460425.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52406421 - 2⁶ = 52406357 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 52406391 and 52406400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52406401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37455 + ... + 38828.

It is an arithmetic number, because the mean of its divisors is an integer number (8772660).

Almost surely, 2^52406421 is an apocalyptic number.

It is an amenable number.

52406421 is a deficient number, since it is larger than the sum of its proper divisors (17774859).

52406421 is a wasteful number, since it uses less digits than its factorization.

52406421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76515.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 52406421 is about 7239.2279284465. The cubic root of 52406421 is about 374.2210104769.

Adding to 52406421 its reverse (12460425), we get a palindrome (64866846).

The spelling of 52406421 in words is "fifty-two million, four hundred six thousand, four hundred twenty-one".