1244020423 has 4 divisors (see below), whose sum is σ = 1262587960. Its totient is φ = 1225452888.

The previous prime is 1244020391. The next prime is 1244020433. The reversal of 1244020423 is 3240204421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3240204421 = 59 ⋅54918719.

It is a cyclic number.

It is not a de Polignac number, because 1244020423 - 2⁵ = 1244020391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1244020394 and 1244020403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244020433) 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, 9283668 + ... + 9283801.

It is an arithmetic number, because the mean of its divisors is an integer number (315646990).

Almost surely, 2^1244020423 is an apocalyptic number.

1244020423 is a deficient number, since it is larger than the sum of its proper divisors (18567537).

1244020423 is an equidigital number, since it uses as much as digits as its factorization.

1244020423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18567536.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1244020423 is about 35270.6736964294. The cubic root of 1244020423 is about 1075.4969176959.

Adding to 1244020423 its reverse (3240204421), we get a palindrome (4484224844).

The spelling of 1244020423 in words is "one billion, two hundred forty-four million, twenty thousand, four hundred twenty-three".