133131245 has 16 divisors (see below), whose sum is σ = 179528832. Its totient is φ = 94036800.

The previous prime is 133131227. The next prime is 133131247. The reversal of 133131245 is 542131331.

It is not a de Polignac number, because 133131245 - 2⁶ = 133131181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

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 133131245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133131247) 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, 43031 + ... + 46020.

It is an arithmetic number, because the mean of its divisors is an integer number (11220552).

Almost surely, 2^133131245 is an apocalyptic number.

It is an amenable number.

133131245 is a deficient number, since it is larger than the sum of its proper divisors (46397587).

133131245 is a wasteful number, since it uses less digits than its factorization.

133131245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89092.

The product of its digits is 1080, while the sum is 23.

The square root of 133131245 is about 11538.2513839836. The cubic root of 133131245 is about 510.6147207598.

Adding to 133131245 its reverse (542131331), we get a palindrome (675262576).

The spelling of 133131245 in words is "one hundred thirty-three million, one hundred thirty-one thousand, two hundred forty-five".