4272421 has 4 divisors (see below), whose sum is σ = 4277772. Its totient is φ = 4267072.

The previous prime is 4272419. The next prime is 4272449. The reversal of 4272421 is 1242724.

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 3348900 + 923521 = 1830^2 + 961^2 .

It is a cyclic number.

It is not a de Polignac number, because 4272421 - 2¹ = 4272419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4272392 and 4272401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4272461) 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, 1210 + ... + 3163.

It is an arithmetic number, because the mean of its divisors is an integer number (1069443).

Almost surely, 2^4272421 is an apocalyptic number.

It is an amenable number.

4272421 is a deficient number, since it is larger than the sum of its proper divisors (5351).

4272421 is an equidigital number, since it uses as much as digits as its factorization.

4272421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5350.

The product of its digits is 896, while the sum is 22.

The square root of 4272421 is about 2066.9835509747. The cubic root of 4272421 is about 162.2649350807.

The spelling of 4272421 in words is "four million, two hundred seventy-two thousand, four hundred twenty-one".