133591142 has 4 divisors (see below), whose sum is σ = 200386716. Its totient is φ = 66795570.

The previous prime is 133591141. The next prime is 133591169. The reversal of 133591142 is 241195331.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133591141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33397784 + ... + 33397787.

It is an arithmetic number, because the mean of its divisors is an integer number (50096679).

Almost surely, 2^133591142 is an apocalyptic number.

133591142 is a deficient number, since it is larger than the sum of its proper divisors (66795574).

133591142 is an equidigital number, since it uses as much as digits as its factorization.

133591142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66795573.

The product of its digits is 3240, while the sum is 29.

The square root of 133591142 is about 11558.1634354252. The cubic root of 133591142 is about 511.2020116243.

The spelling of 133591142 in words is "one hundred thirty-three million, five hundred ninety-one thousand, one hundred forty-two".