33142145 has 16 divisors (see below), whose sum is σ = 40960080. Its totient is φ = 25728000.

The previous prime is 33142141. The next prime is 33142147. The reversal of 33142145 is 54124133.

It can be written as a sum of positive squares in 8 ways, for example, as 5726449 + 27415696 = 2393^2 + 5236^2 .

It is not a de Polignac number, because 33142145 - 2² = 33142141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33142145.

It is not an unprimeable number, because it can be changed into a prime (33142141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54845 + ... + 55445.

It is an arithmetic number, because the mean of its divisors is an integer number (2560005).

Almost surely, 2^33142145 is an apocalyptic number.

It is an amenable number.

33142145 is a deficient number, since it is larger than the sum of its proper divisors (7817935).

33142145 is a wasteful number, since it uses less digits than its factorization.

33142145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916.

The product of its digits is 1440, while the sum is 23.

The square root of 33142145 is about 5756.9214863501. The cubic root of 33142145 is about 321.2133137009.

Adding to 33142145 its reverse (54124133), we get a palindrome (87266278).

The spelling of 33142145 in words is "thirty-three million, one hundred forty-two thousand, one hundred forty-five".