1232130721 has 8 divisors (see below), whose sum is σ = 1242034560. Its totient is φ = 1222263552.

The previous prime is 1232130671. The next prime is 1232130727. The reversal of 1232130721 is 1270312321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1232130721 - 2⁷ = 1232130593 is a prime.

It is a super-2 number, since 2×1232130721² = 3036292227263959682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1232130692 and 1232130701.

It is not an unprimeable number, because it can be changed into a prime (1232130727) 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 in 7 ways as a sum of consecutive naturals, for example, 60396 + ... + 78178.

It is an arithmetic number, because the mean of its divisors is an integer number (155254320).

Almost surely, 2^1232130721 is an apocalyptic number.

It is an amenable number.

1232130721 is a deficient number, since it is larger than the sum of its proper divisors (9903839).

1232130721 is a wasteful number, since it uses less digits than its factorization.

1232130721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18335.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1232130721 is about 35101.7196302403. The cubic root of 1232130721 is about 1072.0595963679.

The spelling of 1232130721 in words is "one billion, two hundred thirty-two million, one hundred thirty thousand, seven hundred twenty-one".