133456865 has 4 divisors (see below), whose sum is σ = 160148244. Its totient is φ = 106765488.

The previous prime is 133456847. The next prime is 133456889. The reversal of 133456865 is 568654331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88190881 + 45265984 = 9391^2 + 6728^2 .

It is a cyclic number.

It is not a de Polignac number, because 133456865 - 2¹⁰ = 133455841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13345682 + ... + 13345691.

It is an arithmetic number, because the mean of its divisors is an integer number (40037061).

Almost surely, 2^133456865 is an apocalyptic number.

It is an amenable number.

133456865 is a deficient number, since it is larger than the sum of its proper divisors (26691379).

133456865 is an equidigital number, since it uses as much as digits as its factorization.

133456865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26691378.

The product of its digits is 259200, while the sum is 41.

The square root of 133456865 is about 11552.3532234779. The cubic root of 133456865 is about 511.0306786983.

The spelling of 133456865 in words is "one hundred thirty-three million, four hundred fifty-six thousand, eight hundred sixty-five".