1231067660 has 24 divisors (see below), whose sum is σ = 2668638336. Its totient is φ = 476542080.

The previous prime is 1231067647. The next prime is 1231067711. The reversal of 1231067660 is 667601321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992177 + ... + 993416.

It is an arithmetic number, because the mean of its divisors is an integer number (111193264).

Almost surely, 2^1231067660 is an apocalyptic number.

1231067660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231067660 is an abundant number, since it is smaller than the sum of its proper divisors (1437570676).

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

1231067660 is a wasteful number, since it uses less digits than its factorization.

1231067660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985633 (or 1985631 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1231067660 is about 35086.5737854240. The cubic root of 1231067660 is about 1071.7511895175.

Adding to 1231067660 its reverse (667601321), we get a palindrome (1898668981).

The spelling of 1231067660 in words is "one billion, two hundred thirty-one million, sixty-seven thousand, six hundred sixty".