1285051018 has 8 divisors (see below), whose sum is σ = 1928304612. Its totient is φ = 642282816.

The previous prime is 1285050983. The next prime is 1285051037. The reversal of 1285051018 is 8101505821.

It can be written as a sum of positive squares in 2 ways, for example, as 1139535049 + 145515969 = 33757^2 + 12063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1285051018² = 3302712237725672648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114655 + ... + 125362.

Almost surely, 2^1285051018 is an apocalyptic number.

1285051018 is a deficient number, since it is larger than the sum of its proper divisors (643253594).

1285051018 is a wasteful number, since it uses less digits than its factorization.

1285051018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242696.

The product of its (nonzero) digits is 3200, while the sum is 31.

The square root of 1285051018 is about 35847.6082605242. The cubic root of 1285051018 is about 1087.1933567638.

Adding to 1285051018 its reverse (8101505821), we get a palindrome (9386556839).

The spelling of 1285051018 in words is "one billion, two hundred eighty-five million, fifty-one thousand, eighteen".