1242244345540 has 24 divisors (see below), whose sum is σ = 2845868864832. Its totient is φ = 451725216480.

The previous prime is 1242244345487. The next prime is 1242244345541. The reversal of 1242244345540 is 455434422421.

It is a super-2 number, since 2×1242244345540² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242244345493 and 1242244345502.

It is not an unprimeable number, because it can be changed into a prime (1242244345541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2823282384 + ... + 2823282823.

It is an arithmetic number, because the mean of its divisors is an integer number (118577869368).

Almost surely, 2^{1242244345540} is an apocalyptic number.

1242244345540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242244345540 is an abundant number, since it is smaller than the sum of its proper divisors (1603624519292).

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

1242244345540 is a wasteful number, since it uses less digits than its factorization.

1242244345540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646565227 (or 5646565225 counting only the distinct ones).

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

Adding to 1242244345540 its reverse (455434422421), we get a palindrome (1697678767961).

The spelling of 1242244345540 in words is "one trillion, two hundred forty-two billion, two hundred forty-four million, three hundred forty-five thousand, five hundred forty".