133445140 has 12 divisors (see below), whose sum is σ = 280234836. Its totient is φ = 53378048.

The previous prime is 133445129. The next prime is 133445161. The reversal of 133445140 is 41544331.

It can be written as a sum of positive squares in 2 ways, for example, as 98446084 + 34999056 = 9922^2 + 5916^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336109 + ... + 3336148.

It is an arithmetic number, because the mean of its divisors is an integer number (23352903).

Almost surely, 2^133445140 is an apocalyptic number.

133445140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133445140 is an abundant number, since it is smaller than the sum of its proper divisors (146789696).

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

133445140 is a wasteful number, since it uses less digits than its factorization.

133445140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672266 (or 6672264 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 133445140 is about 11551.8457399673. The cubic root of 133445140 is about 511.0157125388.

Adding to 133445140 its reverse (41544331), we get a palindrome (174989471).

The spelling of 133445140 in words is "one hundred thirty-three million, four hundred forty-five thousand, one hundred forty".