1390134887522 has 4 divisors (see below), whose sum is σ = 2085202331286. Its totient is φ = 695067443760.

The previous prime is 1390134887503. The next prime is 1390134887567. The reversal of 1390134887522 is 2257884310931.

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

It can be written as a sum of positive squares in only one way, i.e., 1072838136841 + 317296750681 = 1035779^2 + 563291^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347533721879 + ... + 347533721882.

Almost surely, 2^{1390134887522} is an apocalyptic number.

1390134887522 is a deficient number, since it is larger than the sum of its proper divisors (695067443764).

1390134887522 is an equidigital number, since it uses as much as digits as its factorization.

1390134887522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695067443763.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 1390134887522 in words is "one trillion, three hundred ninety billion, one hundred thirty-four million, eight hundred eighty-seven thousand, five hundred twenty-two".