133121045 has 8 divisors (see below), whose sum is σ = 159944760. Its totient is φ = 106363840.

The previous prime is 133121041. The next prime is 133121059. The reversal of 133121045 is 540121331.

It can be written as a sum of positive squares in 4 ways, for example, as 12802084 + 120318961 = 3578^2 + 10969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133121045 - 2² = 133121041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133121041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12110 + ... + 20319.

It is an arithmetic number, because the mean of its divisors is an integer number (19993095).

Almost surely, 2^133121045 is an apocalyptic number.

It is an amenable number.

133121045 is a deficient number, since it is larger than the sum of its proper divisors (26823715).

133121045 is an equidigital number, since it uses as much as digits as its factorization.

133121045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33255.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 133121045 is about 11537.8093674666. The cubic root of 133121045 is about 510.6016799864.

Adding to 133121045 its reverse (540121331), we get a palindrome (673242376).

The spelling of 133121045 in words is "one hundred thirty-three million, one hundred twenty-one thousand, forty-five".