1290085284 has 12 divisors (see below), whose sum is σ = 3010199024. Its totient is φ = 430028424.

The previous prime is 1290085267. The next prime is 1290085289. The reversal of 1290085284 is 4825800921.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1290085289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53753542 + ... + 53753565.

Almost surely, 2^1290085284 is an apocalyptic number.

It is an amenable number.

1290085284 is an abundant number, since it is smaller than the sum of its proper divisors (1720113740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1290085284 is a wasteful number, since it uses less digits than its factorization.

1290085284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107507114 (or 107507112 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 1290085284 is about 35917.7572239693. The cubic root of 1290085284 is about 1088.6112223490.

The spelling of 1290085284 in words is "one billion, two hundred ninety million, eighty-five thousand, two hundred eighty-four".