133142434 has 4 divisors (see below), whose sum is σ = 199713654. Its totient is φ = 66571216.

The previous prime is 133142431. The next prime is 133142441. The reversal of 133142434 is 434241331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434241331 = 29 ⋅14973839.

It can be written as a sum of positive squares in only one way, i.e., 67289209 + 65853225 = 8203^2 + 8115^2 .

It is a junction number, because it is equal to n+sod(n) for n = 133142399 and 133142408.

It is not an unprimeable number, because it can be changed into a prime (133142431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33285607 + ... + 33285610.

Almost surely, 2^133142434 is an apocalyptic number.

133142434 is a deficient number, since it is larger than the sum of its proper divisors (66571220).

133142434 is an equidigital number, since it uses as much as digits as its factorization.

133142434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66571219.

The product of its digits is 3456, while the sum is 25.

The square root of 133142434 is about 11538.7362392941. The cubic root of 133142434 is about 510.6290252106.

Adding to 133142434 its reverse (434241331), we get a palindrome (567383765).

The spelling of 133142434 in words is "one hundred thirty-three million, one hundred forty-two thousand, four hundred thirty-four".