1232641881 has 45 divisors (see below), whose sum is σ = 1904305381. Its totient is φ = 794586888.

The previous prime is 1232641873. The next prime is 1232641957. The reversal of 1232641881 is 1881462321.

The square root of 1232641881 is 35109.

It is a perfect power (a square), and thus also a powerful number.

1232641881 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 641 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 1232641881 - 2³ = 1232641873 is a prime.

It is a super-2 number, since 2×1232641881² = 3038812013590436322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232641381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 14851066 + ... + 14851148.

Almost surely, 2^1232641881 is an apocalyptic number.

1232641881 is the 35109-th square number.

1232641881 is the 17555-th centered octagonal number.

It is an amenable number.

1232641881 is a deficient number, since it is larger than the sum of its proper divisors (671663500).

1232641881 is an frugal number, since it uses more digits than its factorization.

1232641881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 133 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The cubic root of 1232641881 is about 1072.2078269118.

Multiplying 1232641881 by its sum of digits (36), we get a square (44375107716 = 210654²).

The spelling of 1232641881 in words is "one billion, two hundred thirty-two million, six hundred forty-one thousand, eight hundred eighty-one".