133757121 has 24 divisors (see below), whose sum is σ = 188727840. Its totient is φ = 84246976.

The previous prime is 133757119. The next prime is 133757149. The reversal of 133757121 is 121757331.

It is not a de Polignac number, because 133757121 - 2¹ = 133757119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133757101) 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, 140770 + ... + 141716.

It is an arithmetic number, because the mean of its divisors is an integer number (7863660).

Almost surely, 2^133757121 is an apocalyptic number.

It is an amenable number.

133757121 is a deficient number, since it is larger than the sum of its proper divisors (54970719).

133757121 is an equidigital number, since it uses as much as digits as its factorization.

133757121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085 (or 1062 counting only the distinct ones).

The product of its digits is 4410, while the sum is 30.

The square root of 133757121 is about 11565.3413697997. The cubic root of 133757121 is about 511.4136366412.

The spelling of 133757121 in words is "one hundred thirty-three million, seven hundred fifty-seven thousand, one hundred twenty-one".