133561760 has 24 divisors (see below), whose sum is σ = 315540036. Its totient is φ = 53424640.

The previous prime is 133561699. The next prime is 133561763. The reversal of 133561760 is 67165331.

It can be written as a sum of positive squares in 2 ways, for example, as 119333776 + 14227984 = 10924^2 + 3772^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133561763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417221 + ... + 417540.

Almost surely, 2^133561760 is an apocalyptic number.

133561760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133561760 is an abundant number, since it is smaller than the sum of its proper divisors (181978276).

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

133561760 is an equidigital number, since it uses as much as digits as its factorization.

133561760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834776 (or 834768 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 133561760 is about 11556.8923158434. The cubic root of 133561760 is about 511.1645309985.

The spelling of 133561760 in words is "one hundred thirty-three million, five hundred sixty-one thousand, seven hundred sixty".