1290561235885 has 8 divisors (see below), whose sum is σ = 1552369603680. Its totient is φ = 1029984908304.

The previous prime is 1290561235883. The next prime is 1290561235903. The reversal of 1290561235885 is 5885321650921.

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

It is a cyclic number.

It is not a de Polignac number, because 1290561235885 - 2¹ = 1290561235883 is a prime.

It is a super-2 number, since 2×1290561235885² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290561235883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308007747 + ... + 308011936.

It is an arithmetic number, because the mean of its divisors is an integer number (194046200460).

Almost surely, 2^{1290561235885} is an apocalyptic number.

It is an amenable number.

1290561235885 is a deficient number, since it is larger than the sum of its proper divisors (261808367795).

1290561235885 is an equidigital number, since it uses as much as digits as its factorization.

1290561235885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616020107.

The product of its (nonzero) digits is 5184000, while the sum is 55.

The spelling of 1290561235885 in words is "one trillion, two hundred ninety billion, five hundred sixty-one million, two hundred thirty-five thousand, eight hundred eighty-five".