133125644 has 6 divisors (see below), whose sum is σ = 232969884. Its totient is φ = 66562820.

The previous prime is 133125637. The next prime is 133125649. The reversal of 133125644 is 446521331.

It is not an unprimeable number, because it can be changed into a prime (133125649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16640702 + ... + 16640709.

It is an arithmetic number, because the mean of its divisors is an integer number (38828314).

Almost surely, 2^133125644 is an apocalyptic number.

It is an amenable number.

133125644 is a deficient number, since it is larger than the sum of its proper divisors (99844240).

133125644 is a wasteful number, since it uses less digits than its factorization.

133125644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33281415 (or 33281413 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 133125644 is about 11538.0086670101. The cubic root of 133125644 is about 510.6075599235.

Adding to 133125644 its reverse (446521331), we get a palindrome (579646975).

The spelling of 133125644 in words is "one hundred thirty-three million, one hundred twenty-five thousand, six hundred forty-four".