1023442421 has 4 divisors (see below), whose sum is σ = 1023769152. Its totient is φ = 1023115692.

The previous prime is 1023442333. The next prime is 1023442423. The reversal of 1023442421 is 1242443201.

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 an emirpimes, since its reverse is a distinct semiprime: 1242443201 = 29 ⋅42842869.

It is a cyclic number.

It is not a de Polignac number, because 1023442421 - 2²⁶ = 956333557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023442423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158621 + ... + 164946.

It is an arithmetic number, because the mean of its divisors is an integer number (255942288).

Almost surely, 2^1023442421 is an apocalyptic number.

It is an amenable number.

1023442421 is a deficient number, since it is larger than the sum of its proper divisors (326731).

1023442421 is an equidigital number, since it uses as much as digits as its factorization.

1023442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326730.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1023442421 is about 31991.2866418342. The cubic root of 1023442421 is about 1007.7538625552.

Adding to 1023442421 its reverse (1242443201), we get a palindrome (2265885622).

The spelling of 1023442421 in words is "one billion, twenty-three million, four hundred forty-two thousand, four hundred twenty-one".