1442210421 has 4 divisors (see below), whose sum is σ = 1922947232. Its totient is φ = 961473612.

The previous prime is 1442210389. The next prime is 1442210431. The reversal of 1442210421 is 1240122441.

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 not a de Polignac number, because 1442210421 - 2⁵ = 1442210389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442210431) 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, 240368401 + ... + 240368406.

It is an arithmetic number, because the mean of its divisors is an integer number (480736808).

Almost surely, 2^1442210421 is an apocalyptic number.

It is an amenable number.

1442210421 is a deficient number, since it is larger than the sum of its proper divisors (480736811).

1442210421 is an equidigital number, since it uses as much as digits as its factorization.

1442210421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480736810.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1442210421 is about 37976.4456077711. The cubic root of 1442210421 is about 1129.8207408756.

Adding to 1442210421 its reverse (1240122441), we get a palindrome (2682332862).

The spelling of 1442210421 in words is "one billion, four hundred forty-two million, two hundred ten thousand, four hundred twenty-one".