133087441 has 12 divisors (see below), whose sum is σ = 143020836. Its totient is φ = 123415040.

The previous prime is 133087439. The next prime is 133087459. The reversal of 133087441 is 144780331.

It can be written as a sum of positive squares in 2 ways, for example, as 55577025 + 77510416 = 7455^2 + 8804^2 .

It is not a de Polignac number, because 133087441 - 2¹ = 133087439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133087411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84921 + ... + 86473.

It is an arithmetic number, because the mean of its divisors is an integer number (11918403).

Almost surely, 2^133087441 is an apocalyptic number.

It is an amenable number.

133087441 is a deficient number, since it is larger than the sum of its proper divisors (9933395).

133087441 is an equidigital number, since it uses as much as digits as its factorization.

133087441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712 (or 1641 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 133087441 is about 11536.3530199106. The cubic root of 133087441 is about 510.5587123179.

The spelling of 133087441 in words is "one hundred thirty-three million, eighty-seven thousand, four hundred forty-one".