12052421 has 4 divisors (see below), whose sum is σ = 12071532. Its totient is φ = 12033312.

The previous prime is 12052409. The next prime is 12052423. The reversal of 12052421 is 12425021.

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 5827396 + 6225025 = 2414^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 12052421 - 2⁶ = 12052357 is a prime.

It is a super-2 number, since 2×12052421² = 290521703922482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12052421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12052423) 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, 8576 + ... + 9881.

It is an arithmetic number, because the mean of its divisors is an integer number (3017883).

Almost surely, 2^12052421 is an apocalyptic number.

It is an amenable number.

12052421 is a deficient number, since it is larger than the sum of its proper divisors (19111).

12052421 is an equidigital number, since it uses as much as digits as its factorization.

12052421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19110.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12052421 is about 3471.6596895433. The cubic root of 12052421 is about 229.2757368336.

Adding to 12052421 its reverse (12425021), we get a palindrome (24477442).

The spelling of 12052421 in words is "twelve million, fifty-two thousand, four hundred twenty-one".