1287008925 has 24 divisors (see below), whose sum is σ = 2185369056. Its totient is φ = 667851840.

The previous prime is 1287008887. The next prime is 1287008993. The reversal of 1287008925 is 5298007821.

1287008925 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1287008925 - 2⁹ = 1287008413 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229119 + ... + 234668.

It is an arithmetic number, because the mean of its divisors is an integer number (91057044).

Almost surely, 2^1287008925 is an apocalyptic number.

1287008925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1287008925 is a deficient number, since it is larger than the sum of its proper divisors (898360131).

1287008925 is a wasteful number, since it uses less digits than its factorization.

1287008925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463837 (or 463832 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 1287008925 is about 35874.9066200875. The cubic root of 1287008925 is about 1087.7452267698.

The spelling of 1287008925 in words is "one billion, two hundred eighty-seven million, eight thousand, nine hundred twenty-five".