1243825903 has 6 divisors (see below), whose sum is σ = 1261103424. Its totient is φ = 1226781936.

The previous prime is 1243825873. The next prime is 1243825949. The reversal of 1243825903 is 3095283421.

It is not a de Polignac number, because 1243825903 - 2⁵ = 1243825871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243825963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111375 + ... + 122032.

It is an arithmetic number, because the mean of its divisors is an integer number (210183904).

Almost surely, 2^1243825903 is an apocalyptic number.

1243825903 is a deficient number, since it is larger than the sum of its proper divisors (17277521).

1243825903 is an frugal number, since it uses more digits than its factorization.

1243825903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233553 (or 233480 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1243825903 is about 35267.9160569490. The cubic root of 1243825903 is about 1075.4408584433.

The spelling of 1243825903 in words is "one billion, two hundred forty-three million, eight hundred twenty-five thousand, nine hundred three".