133145025 has 24 divisors (see below), whose sum is σ = 237068160. Its totient is φ = 65547840.

The previous prime is 133145021. The next prime is 133145041. The reversal of 133145025 is 520541331.

It is not a de Polignac number, because 133145025 - 2² = 133145021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133144986 and 133145004.

It is not an unprimeable number, because it can be changed into a prime (133145021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67305 + ... + 69254.

It is an arithmetic number, because the mean of its divisors is an integer number (9877840).

Almost surely, 2^133145025 is an apocalyptic number.

133145025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133145025 is a deficient number, since it is larger than the sum of its proper divisors (103923135).

133145025 is a wasteful number, since it uses less digits than its factorization.

133145025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136585 (or 136580 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 133145025 is about 11538.8485127416. The cubic root of 133145025 is about 510.6323375311.

Adding to 133145025 its reverse (520541331), we get a palindrome (653686356).

The spelling of 133145025 in words is "one hundred thirty-three million, one hundred forty-five thousand, twenty-five".