1244256404542 has 16 divisors (see below), whose sum is σ = 1895393682000. Its totient is φ = 612527334400.

The previous prime is 1244256404533. The next prime is 1244256404543. The reversal of 1244256404542 is 2454046524421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244256404543) by changing a digit.

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, 17169667 + ... + 17241982.

It is an arithmetic number, because the mean of its divisors is an integer number (118462105125).

Almost surely, 2^{1244256404542} is an apocalyptic number.

1244256404542 is a deficient number, since it is larger than the sum of its proper divisors (651137277458).

1244256404542 is a wasteful number, since it uses less digits than its factorization.

1244256404542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34411931.

The product of its (nonzero) digits is 1228800, while the sum is 43.

The spelling of 1244256404542 in words is "one trillion, two hundred forty-four billion, two hundred fifty-six million, four hundred four thousand, five hundred forty-two".