1265073855442 has 16 divisors (see below), whose sum is σ = 1903472110080. Its totient is φ = 630584404128.

The previous prime is 1265073855439. The next prime is 1265073855467. The reversal of 1265073855442 is 2445583705621.

It is a self number, because there is not a number n which added to its sum of digits gives 1265073855442.

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 in 7 ways as a sum of consecutive naturals, for example, 1719534 + ... + 2342422.

It is an arithmetic number, because the mean of its divisors is an integer number (118967006880).

Almost surely, 2^{1265073855442} is an apocalyptic number.

1265073855442 is a deficient number, since it is larger than the sum of its proper divisors (638398254638).

1265073855442 is a wasteful number, since it uses less digits than its factorization.

1265073855442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626025.

The product of its (nonzero) digits is 8064000, while the sum is 52.

The spelling of 1265073855442 in words is "one trillion, two hundred sixty-five billion, seventy-three million, eight hundred fifty-five thousand, four hundred forty-two".