1399122985 has 8 divisors (see below), whose sum is σ = 1808097480. Its totient is φ = 1033198464.

The previous prime is 1399122983. The next prime is 1399123021. The reversal of 1399122985 is 5892219931.

It can be written as a sum of positive squares in 4 ways, for example, as 57805609 + 1341317376 = 7603^2 + 36624^2 .

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 1399122985 - 2¹ = 1399122983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1399122983) 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, 10762420 + ... + 10762549.

It is an arithmetic number, because the mean of its divisors is an integer number (226012185).

Almost surely, 2^1399122985 is an apocalyptic number.

It is an amenable number.

1399122985 is a deficient number, since it is larger than the sum of its proper divisors (408974495).

1399122985 is a wasteful number, since it uses less digits than its factorization.

1399122985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21524987.

The product of its digits is 349920, while the sum is 49.

The square root of 1399122985 is about 37404.8524258551. The cubic root of 1399122985 is about 1118.4552963857.

The spelling of 1399122985 in words is "one billion, three hundred ninety-nine million, one hundred twenty-two thousand, nine hundred eighty-five".