1285252616 has 8 divisors (see below), whose sum is σ = 2409848670. Its totient is φ = 642626304.

The previous prime is 1285252613. The next prime is 1285252687. The reversal of 1285252616 is 6162525821.

It can be written as a sum of positive squares in only one way, i.e., 1239744100 + 45508516 = 35210^2 + 6746^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1285252616.

It is not an unprimeable number, because it can be changed into a prime (1285252613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80328281 + ... + 80328296.

Almost surely, 2^1285252616 is an apocalyptic number.

It is an amenable number.

1285252616 is a deficient number, since it is larger than the sum of its proper divisors (1124596054).

1285252616 is a wasteful number, since it uses less digits than its factorization.

1285252616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160656583 (or 160656579 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 1285252616 is about 35850.4200254335. The cubic root of 1285252616 is about 1087.2502065290.

The spelling of 1285252616 in words is "one billion, two hundred eighty-five million, two hundred fifty-two thousand, six hundred sixteen".