1202421423 has 16 divisors (see below), whose sum is σ = 1858070016. Its totient is φ = 677419680.

The previous prime is 1202421413. The next prime is 1202421433. The reversal of 1202421423 is 3241242021.

It is an interprime number because it is at equal distance from previous prime (1202421413) and next prime (1202421433).

It is not a de Polignac number, because 1202421423 - 2²¹ = 1200324271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1202421423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202421413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401736 + ... + 404717.

It is an arithmetic number, because the mean of its divisors is an integer number (116129376).

Almost surely, 2^1202421423 is an apocalyptic number.

1202421423 is a deficient number, since it is larger than the sum of its proper divisors (655648593).

1202421423 is an equidigital number, since it uses as much as digits as its factorization.

1202421423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806534.

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

The square root of 1202421423 is about 34675.9487685629. The cubic root of 1202421423 is about 1063.3728517091.

Adding to 1202421423 its reverse (3241242021), we get a palindrome (4443663444).

The spelling of 1202421423 in words is "one billion, two hundred two million, four hundred twenty-one thousand, four hundred twenty-three".