133481257 has 16 divisors (see below), whose sum is σ = 169587712. Its totient is φ = 102202560.

The previous prime is 133481239. The next prime is 133481279. The reversal of 133481257 is 752184331.

It is a cyclic number.

It is not a de Polignac number, because 133481257 - 2⁷ = 133481129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133481357) 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, 20838 + ... + 26479.

It is an arithmetic number, because the mean of its divisors is an integer number (10599232).

Almost surely, 2^133481257 is an apocalyptic number.

It is an amenable number.

133481257 is a deficient number, since it is larger than the sum of its proper divisors (36106455).

133481257 is a wasteful number, since it uses less digits than its factorization.

133481257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47368.

The product of its digits is 20160, while the sum is 34.

The square root of 133481257 is about 11553.4088908858. The cubic root of 133481257 is about 511.0618106074.

The spelling of 133481257 in words is "one hundred thirty-three million, four hundred eighty-one thousand, two hundred fifty-seven".