133540452 has 18 divisors (see below), whose sum is σ = 337560678. Its totient is φ = 44513472.

The previous prime is 133540441. The next prime is 133540471. The reversal of 133540452 is 254045331.

It can be written as a sum of positive squares in only one way, i.e., 132572196 + 968256 = 11514^2 + 984^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1854693 + ... + 1854764.

It is an arithmetic number, because the mean of its divisors is an integer number (18753371).

Almost surely, 2^133540452 is an apocalyptic number.

133540452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133540452 is an abundant number, since it is smaller than the sum of its proper divisors (204020226).

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

133540452 is a wasteful number, since it uses less digits than its factorization.

133540452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3709467 (or 3709462 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 133540452 is about 11555.9704049465. The cubic root of 133540452 is about 511.1373463884.

Adding to 133540452 its reverse (254045331), we get a palindrome (387585783).

The spelling of 133540452 in words is "one hundred thirty-three million, five hundred forty thousand, four hundred fifty-two".