1205236542 has 32 divisors (see below), whose sum is σ = 2453996160. Its totient is φ = 394506720.

The previous prime is 1205236541. The next prime is 1205236553. The reversal of 1205236542 is 2456325021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205236541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598317 + ... + 600327.

It is an arithmetic number, because the mean of its divisors is an integer number (76687380).

Almost surely, 2^1205236542 is an apocalyptic number.

1205236542 is an abundant number, since it is smaller than the sum of its proper divisors (1248759618).

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

1205236542 is a wasteful number, since it uses less digits than its factorization.

1205236542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1205236542 is about 34716.5168471723. The cubic root of 1205236542 is about 1064.2020640366.

The spelling of 1205236542 in words is "one billion, two hundred five million, two hundred thirty-six thousand, five hundred forty-two".