1242456063549 has 16 divisors (see below), whose sum is σ = 1754542171008. Its totient is φ = 779364029952.

The previous prime is 1242456063469. The next prime is 1242456063601. The reversal of 1242456063549 is 9453606542421.

It is not a de Polignac number, because 1242456063549 - 2⁷ = 1242456063421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242456063449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3193072 + ... + 3560985.

It is an arithmetic number, because the mean of its divisors is an integer number (109658885688).

Almost surely, 2^{1242456063549} is an apocalyptic number.

It is an amenable number.

1242456063549 is a deficient number, since it is larger than the sum of its proper divisors (512086107459).

1242456063549 is a wasteful number, since it uses less digits than its factorization.

1242456063549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6757684.

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 1242456063549 in words is "one trillion, two hundred forty-two billion, four hundred fifty-six million, sixty-three thousand, five hundred forty-nine".