1243140520546 has 8 divisors (see below), whose sum is σ = 1864716868944. Its totient is φ = 621568230900.

The previous prime is 1243140520499. The next prime is 1243140520547. The reversal of 1243140520546 is 6450250413421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1243140520547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74880 + ... + 1578571.

It is an arithmetic number, because the mean of its divisors is an integer number (233089608618).

Almost surely, 2^{1243140520546} is an apocalyptic number.

1243140520546 is a deficient number, since it is larger than the sum of its proper divisors (621576348398).

1243140520546 is a wasteful number, since it uses less digits than its factorization.

1243140520546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029376.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 1243140520546 its reverse (6450250413421), we get a palindrome (7693390933967).

The spelling of 1243140520546 in words is "one trillion, two hundred forty-three billion, one hundred forty million, five hundred twenty thousand, five hundred forty-six".