133442000 has 40 divisors (see below), whose sum is σ = 322667592. Its totient is φ = 53376000.

The previous prime is 133441999. The next prime is 133442009. The reversal of 133442000 is 244331.

It can be written as a sum of positive squares in 4 ways, for example, as 7463824 + 125978176 = 2732^2 + 11224^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 133442000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133442009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31361 + ... + 35360.

Almost surely, 2^133442000 is an apocalyptic number.

133442000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133442000 is an abundant number, since it is smaller than the sum of its proper divisors (189225592).

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

133442000 is an equidigital number, since it uses as much as digits as its factorization.

133442000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66744 (or 66728 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 133442000 is about 11551.7098301507. The cubic root of 133442000 is about 511.0117043950.

Adding to 133442000 its reverse (244331), we get a palindrome (133686331).

It can be divided in two parts, 1334 and 42000, that added together give a palindrome (43334).

The spelling of 133442000 in words is "one hundred thirty-three million, four hundred forty-two thousand".