1023340421 has 4 divisors (see below), whose sum is σ = 1024584672. Its totient is φ = 1022096172.

The previous prime is 1023340393. The next prime is 1023340457. The reversal of 1023340421 is 1240433201.

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: 1240433201 = 7 ⋅177204743.

It is a cyclic number.

It is not a de Polignac number, because 1023340421 - 2¹⁰ = 1023339397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1023340393 and 1023340402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023340481) 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, 620891 + ... + 622536.

It is an arithmetic number, because the mean of its divisors is an integer number (256146168).

Almost surely, 2^1023340421 is an apocalyptic number.

It is an amenable number.

1023340421 is a deficient number, since it is larger than the sum of its proper divisors (1244251).

1023340421 is an equidigital number, since it uses as much as digits as its factorization.

1023340421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244250.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1023340421 is about 31989.6924180274. The cubic root of 1023340421 is about 1007.7203826359.

Adding to 1023340421 its reverse (1240433201), we get a palindrome (2263773622).

The spelling of 1023340421 in words is "one billion, twenty-three million, three hundred forty thousand, four hundred twenty-one".