1245311111142 has 128 divisors (see below), whose sum is σ = 3303536486400. Its totient is φ = 339989747328.

The previous prime is 1245311111071. The next prime is 1245311111153. The reversal of 1245311111142 is 2411111135421.

1245311111142 is a `hidden beast` number, since 1 + 2 + 4 + 531 + 1 + 11 + 114 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8596084 + ... + 8739752.

It is an arithmetic number, because the mean of its divisors is an integer number (25808878800).

Almost surely, 2^{1245311111142} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245311111142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1651768243200).

1245311111142 is an abundant number, since it is smaller than the sum of its proper divisors (2058225375258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245311111142 is a wasteful number, since it uses less digits than its factorization.

1245311111142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144707 (or 144701 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

Adding to 1245311111142 its reverse (2411111135421), we get a palindrome (3656422246563).

The spelling of 1245311111142 in words is "one trillion, two hundred forty-five billion, three hundred eleven million, one hundred eleven thousand, one hundred forty-two".