1285880699 has 4 divisors (see below), whose sum is σ = 1287156120. Its totient is φ = 1284605280.

The previous prime is 1285880693. The next prime is 1285880723. The reversal of 1285880699 is 9960885821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9960885821 = 677 ⋅14713273.

It is a cyclic number.

It is not a de Polignac number, because 1285880699 - 2¹⁶ = 1285815163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285880693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636197 + ... + 638214.

It is an arithmetic number, because the mean of its divisors is an integer number (321789030).

Almost surely, 2^1285880699 is an apocalyptic number.

1285880699 is a deficient number, since it is larger than the sum of its proper divisors (1275421).

1285880699 is a wasteful number, since it uses less digits than its factorization.

1285880699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275420.

The product of its (nonzero) digits is 2488320, while the sum is 56.

The square root of 1285880699 is about 35859.1787273496. The cubic root of 1285880699 is about 1087.4272851191.

The spelling of 1285880699 in words is "one billion, two hundred eighty-five million, eight hundred eighty thousand, six hundred ninety-nine".