133242656 has 12 divisors (see below), whose sum is σ = 262321542. Its totient is φ = 66621312.

The previous prime is 133242643. The next prime is 133242667. The reversal of 133242656 is 656242331.

It can be written as a sum of positive squares in only one way, i.e., 89946256 + 43296400 = 9484^2 + 6580^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 4163833 = 133242656 / (1 + 3 + 3 + 2 + 4 + 2 + 6 + 5 + 6).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2081885 + ... + 2081948.

Almost surely, 2^133242656 is an apocalyptic number.

133242656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133242656 is a deficient number, since it is larger than the sum of its proper divisors (129078886).

133242656 is an equidigital number, since it uses as much as digits as its factorization.

133242656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163843 (or 4163835 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 133242656 is about 11543.0782722808. The cubic root of 133242656 is about 510.7571171724.

Adding to 133242656 its reverse (656242331), we get a palindrome (789484987).

The spelling of 133242656 in words is "one hundred thirty-three million, two hundred forty-two thousand, six hundred fifty-six".