133817142 has 16 divisors (see below), whose sum is σ = 276268032. Its totient is φ = 43166760.

The previous prime is 133817141. The next prime is 133817143. The reversal of 133817142 is 241718331.

It is an interprime number because it is at equal distance from previous prime (133817141) and next prime (133817143).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133817141) 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, 359538 + ... + 359909.

It is an arithmetic number, because the mean of its divisors is an integer number (17266752).

Almost surely, 2^133817142 is an apocalyptic number.

133817142 is an abundant number, since it is smaller than the sum of its proper divisors (142450890).

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

133817142 is a wasteful number, since it uses less digits than its factorization.

133817142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719483.

The product of its digits is 4032, while the sum is 30.

The square root of 133817142 is about 11567.9359438061. The cubic root of 133817142 is about 511.4901209621.

The spelling of 133817142 in words is "one hundred thirty-three million, eight hundred seventeen thousand, one hundred forty-two".