1287142525 has 24 divisors (see below), whose sum is σ = 1679133600. Its totient is φ = 977323200.

The previous prime is 1287142511. The next prime is 1287142529. The reversal of 1287142525 is 5252417821.

It is a happy number.

It is not a de Polignac number, because 1287142525 - 2¹⁵ = 1287109757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287142529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27730 + ... + 57820.

It is an arithmetic number, because the mean of its divisors is an integer number (69963900).

Almost surely, 2^1287142525 is an apocalyptic number.

It is an amenable number.

1287142525 is a deficient number, since it is larger than the sum of its proper divisors (391991075).

1287142525 is a wasteful number, since it uses less digits than its factorization.

1287142525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30189 (or 30184 counting only the distinct ones).

The product of its digits is 44800, while the sum is 37.

The square root of 1287142525 is about 35876.7685975200. The cubic root of 1287142525 is about 1087.7828638396.

The spelling of 1287142525 in words is "one billion, two hundred eighty-seven million, one hundred forty-two thousand, five hundred twenty-five".