1298785016 has 8 divisors (see below), whose sum is σ = 2435221920. Its totient is φ = 649392504.

The previous prime is 1298785001. The next prime is 1298785027. The reversal of 1298785016 is 6105878921.

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

It is a super-2 number, since 2×1298785016² = 3373685035572240512, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 81174056 + ... + 81174071.

It is an arithmetic number, because the mean of its divisors is an integer number (304402740).

Almost surely, 2^1298785016 is an apocalyptic number.

It is an amenable number.

1298785016 is a deficient number, since it is larger than the sum of its proper divisors (1136436904).

1298785016 is a wasteful number, since it uses less digits than its factorization.

1298785016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162348133 (or 162348129 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 47.

The square root of 1298785016 is about 36038.6600194846. The cubic root of 1298785016 is about 1091.0527707002.

The spelling of 1298785016 in words is "one billion, two hundred ninety-eight million, seven hundred eighty-five thousand, sixteen".