1232664781 has 8 divisors (see below), whose sum is σ = 1307125944. Its totient is φ = 1158420480.

The previous prime is 1232664779. The next prime is 1232664791. The reversal of 1232664781 is 1874662321.

It can be written as a sum of positive squares in 4 ways, for example, as 516834756 + 715830025 = 22734^2 + 26755^2 .

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 1232664781 - 2¹ = 1232664779 is a prime.

It is a super-2 number, since 2×1232664781² = 3038924924635555922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232664751) 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 7 ways as a sum of consecutive naturals, for example, 42430 + ... + 65311.

It is an arithmetic number, because the mean of its divisors is an integer number (163390743).

Almost surely, 2^1232664781 is an apocalyptic number.

It is an amenable number.

1232664781 is a deficient number, since it is larger than the sum of its proper divisors (74461163).

1232664781 is a wasteful number, since it uses less digits than its factorization.

1232664781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108431.

The product of its digits is 96768, while the sum is 40.

The square root of 1232664781 is about 35109.3261256892. The cubic root of 1232664781 is about 1072.2144666903.

The spelling of 1232664781 in words is "one billion, two hundred thirty-two million, six hundred sixty-four thousand, seven hundred eighty-one".