1205125442 has 4 divisors (see below), whose sum is σ = 1807688166. Its totient is φ = 602562720.

The previous prime is 1205125417. The next prime is 1205125447. The reversal of 1205125442 is 2445215021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1150498561 + 54626881 = 33919^2 + 7391^2 .

It is not an unprimeable number, because it can be changed into a prime (1205125447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301281359 + ... + 301281362.

Almost surely, 2^1205125442 is an apocalyptic number.

1205125442 is a deficient number, since it is larger than the sum of its proper divisors (602562724).

1205125442 is an equidigital number, since it uses as much as digits as its factorization.

1205125442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602562723.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1205125442 is about 34714.9167073752. The cubic root of 1205125442 is about 1064.1693632684.

The spelling of 1205125442 in words is "one billion, two hundred five million, one hundred twenty-five thousand, four hundred forty-two".