1242003215445 has 16 divisors (see below), whose sum is σ = 1987453954752. Its totient is φ = 662318778240.

The previous prime is 1242003215419. The next prime is 1242003215459. The reversal of 1242003215445 is 5445123002421.

It is not a de Polignac number, because 1242003215445 - 2¹⁵ = 1242003182677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5059651 + ... + 5299440.

It is an arithmetic number, because the mean of its divisors is an integer number (124215872172).

Almost surely, 2^{1242003215445} is an apocalyptic number.

1242003215445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242003215445 is a deficient number, since it is larger than the sum of its proper divisors (745450739307).

1242003215445 is a wasteful number, since it uses less digits than its factorization.

1242003215445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10367092.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 1242003215445 its reverse (5445123002421), we get a palindrome (6687126217866).

The spelling of 1242003215445 in words is "one trillion, two hundred forty-two billion, three million, two hundred fifteen thousand, four hundred forty-five".