1244425631 has 2 divisors, whose sum is σ = 1244425632. Its totient is φ = 1244425630.

The previous prime is 1244425607. The next prime is 1244425673. The reversal of 1244425631 is 1365244421.

It is a weak prime.

It is an emirp because it is prime and its reverse (1365244421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244425631 is a prime.

It is a super-2 number, since 2×1244425631² = 3097190302179496322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244425601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622212815 + 622212816.

It is an arithmetic number, because the mean of its divisors is an integer number (622212816).

Almost surely, 2^1244425631 is an apocalyptic number.

1244425631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244425631 is an equidigital number, since it uses as much as digits as its factorization.

1244425631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 32.

The square root of 1244425631 is about 35276.4174910095. The cubic root of 1244425631 is about 1075.6136769384.

The spelling of 1244425631 in words is "one billion, two hundred forty-four million, four hundred twenty-five thousand, six hundred thirty-one".