133145542 has 4 divisors (see below), whose sum is σ = 199718316. Its totient is φ = 66572770.

The previous prime is 133145539. The next prime is 133145567. The reversal of 133145542 is 245541331.

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

It is a self number, because there is not a number n which added to its sum of digits gives 133145542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33286384 + ... + 33286387.

It is an arithmetic number, because the mean of its divisors is an integer number (49929579).

Almost surely, 2^133145542 is an apocalyptic number.

133145542 is a deficient number, since it is larger than the sum of its proper divisors (66572774).

133145542 is an equidigital number, since it uses as much as digits as its factorization.

133145542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66572773.

The product of its digits is 7200, while the sum is 28.

The square root of 133145542 is about 11538.8709153019. The cubic root of 133145542 is about 510.6329984560.

Adding to 133145542 its reverse (245541331), we get a palindrome (378686873).

The spelling of 133145542 in words is "one hundred thirty-three million, one hundred forty-five thousand, five hundred forty-two".