1287845125 has 32 divisors (see below), whose sum is σ = 1886526720. Its totient is φ = 859204800.

The previous prime is 1287845101. The next prime is 1287845173. The reversal of 1287845125 is 5215487821.

It is not a de Polignac number, because 1287845125 - 2⁵ = 1287845093 is a prime.

It is a super-3 number, since 3×1287845125³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12486 + ... + 52264.

It is an arithmetic number, because the mean of its divisors is an integer number (58953960).

Almost surely, 2^1287845125 is an apocalyptic number.

It is an amenable number.

1287845125 is a deficient number, since it is larger than the sum of its proper divisors (598681595).

1287845125 is an equidigital number, since it uses as much as digits as its factorization.

1287845125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39838 (or 39828 counting only the distinct ones).

The product of its digits is 179200, while the sum is 43.

The square root of 1287845125 is about 35886.5591134062. The cubic root of 1287845125 is about 1087.9807536627.

The spelling of 1287845125 in words is "one billion, two hundred eighty-seven million, eight hundred forty-five thousand, one hundred twenty-five".