1245662321142 has 32 divisors (see below), whose sum is σ = 2599925822208. Its totient is φ = 397124503776.

The previous prime is 1245662321131. The next prime is 1245662321171. The reversal of 1245662321142 is 2411232665421.

It is a self number, because there is not a number n which added to its sum of digits gives 1245662321142.

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, 794868 + ... + 1767240.

It is an arithmetic number, because the mean of its divisors is an integer number (81247681944).

Almost surely, 2^{1245662321142} is an apocalyptic number.

1245662321142 is an abundant number, since it is smaller than the sum of its proper divisors (1354263501066).

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

1245662321142 is a wasteful number, since it uses less digits than its factorization.

1245662321142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981684.

The product of its digits is 138240, while the sum is 39.

Adding to 1245662321142 its reverse (2411232665421), we get a palindrome (3656894986563).

The spelling of 1245662321142 in words is "one trillion, two hundred forty-five billion, six hundred sixty-two million, three hundred twenty-one thousand, one hundred forty-two".