133872145 has 16 divisors (see below), whose sum is σ = 177656832. Its totient is φ = 96024960.

The previous prime is 133872143. The next prime is 133872163. The reversal of 133872145 is 541278331.

It is not a de Polignac number, because 133872145 - 2¹ = 133872143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133872145.

It is not an unprimeable number, because it can be changed into a prime (133872143) 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, 12657 + ... + 20686.

It is an arithmetic number, because the mean of its divisors is an integer number (11103552).

Almost surely, 2^133872145 is an apocalyptic number.

It is an amenable number.

133872145 is a deficient number, since it is larger than the sum of its proper divisors (43784687).

133872145 is a wasteful number, since it uses less digits than its factorization.

133872145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33432.

The product of its digits is 20160, while the sum is 34.

The square root of 133872145 is about 11570.3130899730. The cubic root of 133872145 is about 511.5601908027.

It can be divided in two parts, 133 and 872145, that added together give a palindrome (872278).

The spelling of 133872145 in words is "one hundred thirty-three million, eight hundred seventy-two thousand, one hundred forty-five".