133061257 has 8 divisors (see below), whose sum is σ = 152140032. Its totient is φ = 114000000.

The previous prime is 133061249. The next prime is 133061267. The reversal of 133061257 is 752160331.

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

It is a cyclic number.

It is not a de Polignac number, because 133061257 - 2³ = 133061249 is a prime.

It is a super-2 number, since 2×133061257² = 35410596228840098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133061267) 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, 25632 + ... + 30382.

It is an arithmetic number, because the mean of its divisors is an integer number (19017504).

Almost surely, 2^133061257 is an apocalyptic number.

It is an amenable number.

133061257 is a deficient number, since it is larger than the sum of its proper divisors (19078775).

133061257 is an equidigital number, since it uses as much as digits as its factorization.

133061257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8759.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 133061257 is about 11535.2181167068. The cubic root of 133061257 is about 510.5252271995.

The spelling of 133061257 in words is "one hundred thirty-three million, sixty-one thousand, two hundred fifty-seven".