1243844425 has 12 divisors (see below), whose sum is σ = 1575184896. Its totient is φ = 973902800.

The previous prime is 1243844417. The next prime is 1243844447. The reversal of 1243844425 is 5244483421.

It is not a de Polignac number, because 1243844425 - 2³ = 1243844417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 528121 + ... + 530470.

It is an arithmetic number, because the mean of its divisors is an integer number (131265408).

Almost surely, 2^1243844425 is an apocalyptic number.

It is an amenable number.

1243844425 is a deficient number, since it is larger than the sum of its proper divisors (331340471).

1243844425 is a wasteful number, since it uses less digits than its factorization.

1243844425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058648 (or 1058643 counting only the distinct ones).

The product of its digits is 122880, while the sum is 37.

The square root of 1243844425 is about 35268.1786459125. The cubic root of 1243844425 is about 1075.4461966011.

The spelling of 1243844425 in words is "one billion, two hundred forty-three million, eight hundred forty-four thousand, four hundred twenty-five".