1151312642 has 4 divisors (see below), whose sum is σ = 1726968966. Its totient is φ = 575656320.

The previous prime is 1151312639. The next prime is 1151312647. The reversal of 1151312642 is 2462131511.

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., 670343881 + 480968761 = 25891^2 + 21931^2 .

It is not an unprimeable number, because it can be changed into a prime (1151312647) 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, 287828159 + ... + 287828162.

Almost surely, 2^1151312642 is an apocalyptic number.

1151312642 is a deficient number, since it is larger than the sum of its proper divisors (575656324).

1151312642 is an equidigital number, since it uses as much as digits as its factorization.

1151312642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575656323.

The product of its digits is 1440, while the sum is 26.

The square root of 1151312642 is about 33930.9982464413. The cubic root of 1151312642 is about 1048.0880222719.

The spelling of 1151312642 in words is "one billion, one hundred fifty-one million, three hundred twelve thousand, six hundred forty-two".