135571001 has 8 divisors (see below), whose sum is σ = 137777640. Its totient is φ = 133373952.

The previous prime is 135570943. The next prime is 135571003. The reversal of 135571001 is 100175531.

It can be written as a sum of positive squares in 4 ways, for example, as 28344976 + 107226025 = 5324^2 + 10355^2 .

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 135571001 - 2¹⁸ = 135308857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135571003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29465 + ... + 33753.

It is an arithmetic number, because the mean of its divisors is an integer number (17222205).

Almost surely, 2^135571001 is an apocalyptic number.

It is an amenable number.

135571001 is a deficient number, since it is larger than the sum of its proper divisors (2206639).

135571001 is an equidigital number, since it uses as much as digits as its factorization.

135571001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4795.

The product of its (nonzero) digits is 525, while the sum is 23.

The square root of 135571001 is about 11643.4960815040. The cubic root of 135571001 is about 513.7150244461.

The spelling of 135571001 in words is "one hundred thirty-five million, five hundred seventy-one thousand, one".