32406421 has 4 divisors (see below), whose sum is σ = 32585644. Its totient is φ = 32227200.

The previous prime is 32406383. The next prime is 32406443. The reversal of 32406421 is 12460423.

It is a happy number.

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 3944196 + 28462225 = 1986^2 + 5335^2 .

It is a cyclic number.

It is not a de Polignac number, because 32406421 - 2¹¹ = 32404373 is a prime.

It is a super-2 number, since 2×32406421² = 2100352244058482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32406392 and 32406401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32406221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89340 + ... + 89701.

It is an arithmetic number, because the mean of its divisors is an integer number (8146411).

Almost surely, 2^32406421 is an apocalyptic number.

It is an amenable number.

32406421 is a deficient number, since it is larger than the sum of its proper divisors (179223).

32406421 is a wasteful number, since it uses less digits than its factorization.

32406421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179222.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 32406421 is about 5692.6637877184. The cubic root of 32406421 is about 318.8186290263.

Adding to 32406421 its reverse (12460423), we get a palindrome (44866844).

The spelling of 32406421 in words is "thirty-two million, four hundred six thousand, four hundred twenty-one".