1285089139391 has 4 divisors (see below), whose sum is σ = 1285093675272. Its totient is φ = 1285084603512.

The previous prime is 1285089139363. The next prime is 1285089139403. The reversal of 1285089139391 is 1939319805821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285089139391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1285089139391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285089139361) 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, 1812476 + ... + 2419761.

It is an arithmetic number, because the mean of its divisors is an integer number (321273418818).

Almost surely, 2^{1285089139391} is an apocalyptic number.

1285089139391 is a deficient number, since it is larger than the sum of its proper divisors (4535881).

1285089139391 is an equidigital number, since it uses as much as digits as its factorization.

1285089139391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535880.

The product of its (nonzero) digits is 4199040, while the sum is 59.

The spelling of 1285089139391 in words is "one trillion, two hundred eighty-five billion, eighty-nine million, one hundred thirty-nine thousand, three hundred ninety-one".