1244423131 has 4 divisors (see below), whose sum is σ = 1422197872. Its totient is φ = 1066648392.

The previous prime is 1244423123. The next prime is 1244423143. The reversal of 1244423131 is 1313244421.

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

It is a cyclic number.

It is not a de Polignac number, because 1244423131 - 2³ = 1244423123 is a prime.

It is a super-2 number, since 2×1244423131² = 3097177857935686322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1244423096 and 1244423105.

It is not an unprimeable number, because it can be changed into a prime (1244403131) 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, 88887360 + ... + 88887373.

It is an arithmetic number, because the mean of its divisors is an integer number (355549468).

Almost surely, 2^1244423131 is an apocalyptic number.

1244423131 is a deficient number, since it is larger than the sum of its proper divisors (177774741).

1244423131 is an equidigital number, since it uses as much as digits as its factorization.

1244423131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177774740.

The product of its digits is 2304, while the sum is 25.

The square root of 1244423131 is about 35276.3820565545. The cubic root of 1244423131 is about 1075.6129566500.

Adding to 1244423131 its reverse (1313244421), we get a palindrome (2557667552).

The spelling of 1244423131 in words is "one billion, two hundred forty-four million, four hundred twenty-three thousand, one hundred thirty-one".