1245542243242 has 32 divisors (see below), whose sum is σ = 2042491852800. Its totient is φ = 564953297520.

The previous prime is 1245542243237. The next prime is 1245542243249. The reversal of 1245542243242 is 2423422455421.

It is a junction number, because it is equal to n+sod(n) for n = 1245542243195 and 1245542243204.

It is not an unprimeable number, because it can be changed into a prime (1245542243249) 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, 25764009 + ... + 25812307.

It is an arithmetic number, because the mean of its divisors is an integer number (63827870400).

Almost surely, 2^{1245542243242} is an apocalyptic number.

1245542243242 is a deficient number, since it is larger than the sum of its proper divisors (796949609558).

1245542243242 is a wasteful number, since it uses less digits than its factorization.

1245542243242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50778.

The product of its digits is 614400, while the sum is 40.

Adding to 1245542243242 its reverse (2423422455421), we get a palindrome (3668964698663).

The spelling of 1245542243242 in words is "one trillion, two hundred forty-five billion, five hundred forty-two million, two hundred forty-three thousand, two hundred forty-two".