420432241 has 4 divisors (see below), whose sum is σ = 424766692. Its totient is φ = 416097792.

The previous prime is 420432239. The next prime is 420432277. The reversal of 420432241 is 142234024.

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 191545600 + 228886641 = 13840^2 + 15129^2 .

It is a cyclic number.

It is not a de Polignac number, because 420432241 - 2¹ = 420432239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420432281) 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, 2167080 + ... + 2167273.

It is an arithmetic number, because the mean of its divisors is an integer number (106191673).

Almost surely, 2^420432241 is an apocalyptic number.

It is an amenable number.

420432241 is a deficient number, since it is larger than the sum of its proper divisors (4334451).

420432241 is an equidigital number, since it uses as much as digits as its factorization.

420432241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4334450.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 420432241 is about 20504.4444206616. Note that the first 4 decimals coincide. The cubic root of 420432241 is about 749.1440552200.

Adding to 420432241 its reverse (142234024), we get a palindrome (562666265).

The spelling of 420432241 in words is "four hundred twenty million, four hundred thirty-two thousand, two hundred forty-one".