133261504 has 56 divisors (see below), whose sum is σ = 285402528. Its totient is φ = 61501440.

The previous prime is 133261501. The next prime is 133261519. The reversal of 133261504 is 405162331.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (133261501) 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, 56509 + ... + 58819.

Almost surely, 2^133261504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133261504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142701264).

133261504 is an abundant number, since it is smaller than the sum of its proper divisors (152141024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133261504 is a wasteful number, since it uses less digits than its factorization.

133261504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393 (or 2383 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 133261504 is about 11543.8946634141. The cubic root of 133261504 is about 510.7811992908.

The spelling of 133261504 in words is "one hundred thirty-three million, two hundred sixty-one thousand, five hundred four".