1245706889426 has 4 divisors (see below), whose sum is σ = 1868560334142. Its totient is φ = 622853444712.

The previous prime is 1245706889411. The next prime is 1245706889431. The reversal of 1245706889426 is 6249886075421.

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., 1054829648401 + 190877241025 = 1027049^2 + 436895^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311426722355 + ... + 311426722358.

Almost surely, 2^{1245706889426} is an apocalyptic number.

1245706889426 is a deficient number, since it is larger than the sum of its proper divisors (622853444716).

1245706889426 is an equidigital number, since it uses as much as digits as its factorization.

1245706889426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622853444715.

The product of its (nonzero) digits is 46448640, while the sum is 62.

The spelling of 1245706889426 in words is "one trillion, two hundred forty-five billion, seven hundred six million, eight hundred eighty-nine thousand, four hundred twenty-six".