43421253 has 4 divisors (see below), whose sum is σ = 57895008. Its totient is φ = 28947500.

The previous prime is 43421249. The next prime is 43421269. The reversal of 43421253 is 35212434.

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 43421253 - 2² = 43421249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43421233) 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, 7236873 + ... + 7236878.

It is an arithmetic number, because the mean of its divisors is an integer number (14473752).

Almost surely, 2^43421253 is an apocalyptic number.

It is an amenable number.

43421253 is a deficient number, since it is larger than the sum of its proper divisors (14473755).

43421253 is a wasteful number, since it uses less digits than its factorization.

43421253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14473754.

The product of its digits is 2880, while the sum is 24.

The square root of 43421253 is about 6589.4804802807. The cubic root of 43421253 is about 351.4801344744.

Adding to 43421253 its reverse (35212434), we get a palindrome (78633687).

The spelling of 43421253 in words is "forty-three million, four hundred twenty-one thousand, two hundred fifty-three".