1322785081 has 4 divisors (see below), whose sum is σ = 1322872564. Its totient is φ = 1322697600.

The previous prime is 1322785067. The next prime is 1322785103. The reversal of 1322785081 is 1805872231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1805872231 = 349 ⋅5174419.

It can be written as a sum of positive squares in 2 ways, for example, as 882624681 + 440160400 = 29709^2 + 20980^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322785081 - 2¹⁵ = 1322752313 is a prime.

It is a super-2 number, since 2×1322785081² = 3499520741032353122, which contains 22 as substring.

It is a deceptive number, since it divides R_1322785080.

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 1322785081.

It is not an unprimeable number, because it can be changed into a prime (1322785001) 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, 14580 + ... + 53461.

It is an arithmetic number, because the mean of its divisors is an integer number (330718141).

Almost surely, 2^1322785081 is an apocalyptic number.

1322785081 is the 19441-st nonagonal number.

It is an amenable number.

1322785081 is a deficient number, since it is larger than the sum of its proper divisors (87483).

1322785081 is an equidigital number, since it uses as much as digits as its factorization.

1322785081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87482.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 1322785081 is about 36370.1124688940. The cubic root of 1322785081 is about 1097.7322650164.

The spelling of 1322785081 in words is "one billion, three hundred twenty-two million, seven hundred eighty-five thousand, eighty-one".