36405601 has 4 divisors (see below), whose sum is σ = 36616212. Its totient is φ = 36194992.

The previous prime is 36405599. The next prime is 36405623. The reversal of 36405601 is 10650463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10650463 = 1667 ⋅6389.

It can be written as a sum of positive squares in 2 ways, for example, as 31911201 + 4494400 = 5649^2 + 2120^2 .

It is a cyclic number.

It is not a de Polignac number, because 36405601 - 2¹ = 36405599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36405661) 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, 105046 + ... + 105391.

It is an arithmetic number, because the mean of its divisors is an integer number (9154053).

Almost surely, 2^36405601 is an apocalyptic number.

It is an amenable number.

36405601 is a deficient number, since it is larger than the sum of its proper divisors (210611).

36405601 is a wasteful number, since it uses less digits than its factorization.

36405601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210610.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 36405601 is about 6033.7054120996. The cubic root of 36405601 is about 331.4281568759.

The spelling of 36405601 in words is "thirty-six million, four hundred five thousand, six hundred one".