1243825904 has 20 divisors (see below), whose sum is σ = 2410469976. Its totient is φ = 621769152.

The previous prime is 1243825873. The next prime is 1243825949. The reversal of 1243825904 is 4095283421.

It is a super-2 number, since 2×1243825904² = 3094205758922834432, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110522 + ... + 121254.

Almost surely, 2^1243825904 is an apocalyptic number.

It is an amenable number.

1243825904 is a deficient number, since it is larger than the sum of its proper divisors (1166644072).

1243825904 is a wasteful number, since it uses less digits than its factorization.

1243825904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17984 (or 17978 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1243825904 is about 35267.9160711262. The cubic root of 1243825904 is about 1075.4408587315.

The spelling of 1243825904 in words is "one billion, two hundred forty-three million, eight hundred twenty-five thousand, nine hundred four".