1202423421 has 4 divisors (see below), whose sum is σ = 1603231232. Its totient is φ = 801615612.

The previous prime is 1202423401. The next prime is 1202423437. The reversal of 1202423421 is 1243242021.

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 1202423421 - 2⁶ = 1202423357 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 (1202423401) 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, 200403901 + ... + 200403906.

It is an arithmetic number, because the mean of its divisors is an integer number (400807808).

Almost surely, 2^1202423421 is an apocalyptic number.

It is an amenable number.

1202423421 is a deficient number, since it is larger than the sum of its proper divisors (400807811).

1202423421 is an equidigital number, since it uses as much as digits as its factorization.

1202423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400807810.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1202423421 is about 34675.9775781448. The cubic root of 1202423421 is about 1063.3734406922.

Adding to 1202423421 its reverse (1243242021), we get a palindrome (2445665442).

The spelling of 1202423421 in words is "one billion, two hundred two million, four hundred twenty-three thousand, four hundred twenty-one".