4253021 has 4 divisors (see below), whose sum is σ = 4257792. Its totient is φ = 4248252.

The previous prime is 4252993. The next prime is 4253023. The reversal of 4253021 is 1203524.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4253021 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4253023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 605 + ... + 2978.

It is an arithmetic number, because the mean of its divisors is an integer number (1064448).

Almost surely, 2^4253021 is an apocalyptic number.

It is an amenable number.

4253021 is a deficient number, since it is larger than the sum of its proper divisors (4771).

4253021 is a wasteful number, since it uses less digits than its factorization.

4253021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4770.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 4253021 is about 2062.2853827732. The cubic root of 4253021 is about 162.0189608453.

Adding to 4253021 its reverse (1203524), we get a palindrome (5456545).

The spelling of 4253021 in words is "four million, two hundred fifty-three thousand, twenty-one".