1285329617 has 16 divisors (see below), whose sum is σ = 1528244928. Its totient is φ = 1065593280.

The previous prime is 1285329593. The next prime is 1285329629. The reversal of 1285329617 is 7169235821.

It is a cyclic number.

It is not a de Polignac number, because 1285329617 - 2¹⁸ = 1285067473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285629617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42278 + ... + 66015.

It is an arithmetic number, because the mean of its divisors is an integer number (95515308).

Almost surely, 2^1285329617 is an apocalyptic number.

It is an amenable number.

1285329617 is a deficient number, since it is larger than the sum of its proper divisors (242915311).

1285329617 is a wasteful number, since it uses less digits than its factorization.

1285329617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108400.

The product of its digits is 181440, while the sum is 44.

The square root of 1285329617 is about 35851.4939298211. The cubic root of 1285329617 is about 1087.2719189095.

The spelling of 1285329617 in words is "one billion, two hundred eighty-five million, three hundred twenty-nine thousand, six hundred seventeen".