1140420423 has 4 divisors (see below), whose sum is σ = 1520560568. Its totient is φ = 760280280.

The previous prime is 1140420409. The next prime is 1140420443. The reversal of 1140420423 is 3240240411.

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

It is not a de Polignac number, because 1140420423 - 2¹² = 1140416327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1140420423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140420443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190070068 + ... + 190070073.

It is an arithmetic number, because the mean of its divisors is an integer number (380140142).

Almost surely, 2^1140420423 is an apocalyptic number.

1140420423 is a deficient number, since it is larger than the sum of its proper divisors (380140145).

1140420423 is an equidigital number, since it uses as much as digits as its factorization.

1140420423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380140144.

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

The square root of 1140420423 is about 33770.1113856617. Note that the first 3 decimals coincide. The cubic root of 1140420423 is about 1044.7723298499.

Adding to 1140420423 its reverse (3240240411), we get a palindrome (4380660834).

The spelling of 1140420423 in words is "one billion, one hundred forty million, four hundred twenty thousand, four hundred twenty-three".