1231160642 has 4 divisors (see below), whose sum is σ = 1846740966. Its totient is φ = 615580320.

The previous prime is 1231160641. The next prime is 1231160657. The reversal of 1231160642 is 2460611321.

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., 854451361 + 376709281 = 29231^2 + 19409^2 .

It is not an unprimeable number, because it can be changed into a prime (1231160641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307790159 + ... + 307790162.

Almost surely, 2^1231160642 is an apocalyptic number.

1231160642 is a deficient number, since it is larger than the sum of its proper divisors (615580324).

1231160642 is an equidigital number, since it uses as much as digits as its factorization.

1231160642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615580323.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1231160642 is about 35087.8987971637. The cubic root of 1231160642 is about 1071.7781718039.

Adding to 1231160642 its reverse (2460611321), we get a palindrome (3691771963).

The spelling of 1231160642 in words is "one billion, two hundred thirty-one million, one hundred sixty thousand, six hundred forty-two".