135772201 has 4 divisors (see below), whose sum is σ = 136206292. Its totient is φ = 135338112.

The previous prime is 135772181. The next prime is 135772207. The reversal of 135772201 is 102277531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102277531 = 2909 ⋅35159.

It can be written as a sum of positive squares in 2 ways, for example, as 4096576 + 131675625 = 2024^2 + 11475^2 .

It is a cyclic number.

It is not a de Polignac number, because 135772201 - 2⁹ = 135771689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135772201.

It is not an unprimeable number, because it can be changed into a prime (135772207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216576 + ... + 217201.

It is an arithmetic number, because the mean of its divisors is an integer number (34051573).

Almost surely, 2^135772201 is an apocalyptic number.

It is an amenable number.

135772201 is a deficient number, since it is larger than the sum of its proper divisors (434091).

135772201 is an equidigital number, since it uses as much as digits as its factorization.

135772201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434090.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 135772201 is about 11652.1328948824. The cubic root of 135772201 is about 513.9690324876.

The spelling of 135772201 in words is "one hundred thirty-five million, seven hundred seventy-two thousand, two hundred one".