1287079525 has 6 divisors (see below), whose sum is σ = 1595978642. Its totient is φ = 1029663600.

The previous prime is 1287079501. The next prime is 1287079621. The reversal of 1287079525 is 5259707821.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 279524961 + 1007554564 = 16719^2 + 31742^2 .

It is not a de Polignac number, because 1287079525 - 2¹³ = 1287071333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25741566 + ... + 25741615.

Almost surely, 2^1287079525 is an apocalyptic number.

It is an amenable number.

1287079525 is a deficient number, since it is larger than the sum of its proper divisors (308899117).

1287079525 is an equidigital number, since it uses as much as digits as its factorization.

1287079525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51483191 (or 51483186 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 1287079525 is about 35875.8905812803. The cubic root of 1287079525 is about 1087.7651161447.

The spelling of 1287079525 in words is "one billion, two hundred eighty-seven million, seventy-nine thousand, five hundred twenty-five".