1234021423 has 4 divisors (see below), whose sum is σ = 1234304848. Its totient is φ = 1233738000.

The previous prime is 1234021417. The next prime is 1234021429. The reversal of 1234021423 is 3241204321.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1234021417) and next prime (1234021429).

It is a cyclic number.

It is not a de Polignac number, because 1234021423 - 2²¹ = 1231924271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1234021394 and 1234021403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234021429) 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, 135078 + ... + 143923.

It is an arithmetic number, because the mean of its divisors is an integer number (308576212).

Almost surely, 2^1234021423 is an apocalyptic number.

1234021423 is a deficient number, since it is larger than the sum of its proper divisors (283425).

1234021423 is an equidigital number, since it uses as much as digits as its factorization.

1234021423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283424.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1234021423 is about 35128.6410639524. The cubic root of 1234021423 is about 1072.6076738542.

Adding to 1234021423 its reverse (3241204321), we get a palindrome (4475225744).

The spelling of 1234021423 in words is "one billion, two hundred thirty-four million, twenty-one thousand, four hundred twenty-three".