1243065542 has 16 divisors (see below), whose sum is σ = 1916011680. Its totient is φ = 604412928.

The previous prime is 1243065533. The next prime is 1243065569. The reversal of 1243065542 is 2455603421.

It is a junction number, because it is equal to n+sod(n) for n = 1243065499 and 1243065508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195863 + ... + 202109.

It is an arithmetic number, because the mean of its divisors is an integer number (119750730).

Almost surely, 2^1243065542 is an apocalyptic number.

1243065542 is a deficient number, since it is larger than the sum of its proper divisors (672946138).

1243065542 is a wasteful number, since it uses less digits than its factorization.

1243065542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8975.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1243065542 is about 35257.1346254911. The cubic root of 1243065542 is about 1075.2216718277.

Adding to 1243065542 its reverse (2455603421), we get a palindrome (3698668963).

The spelling of 1243065542 in words is "one billion, two hundred forty-three million, sixty-five thousand, five hundred forty-two".