36540921 has 4 divisors (see below), whose sum is σ = 48721232. Its totient is φ = 24360612.

The previous prime is 36540901. The next prime is 36540947. The reversal of 36540921 is 12904563.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 36540921 - 2⁹ = 36540409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36540901) 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, 6090151 + ... + 6090156.

It is an arithmetic number, because the mean of its divisors is an integer number (12180308).

Almost surely, 2^36540921 is an apocalyptic number.

It is an amenable number.

36540921 is a deficient number, since it is larger than the sum of its proper divisors (12180311).

36540921 is a wasteful number, since it uses less digits than its factorization.

36540921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12180310.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 36540921 is about 6044.9086841738. The cubic root of 36540921 is about 331.8382897815.

The spelling of 36540921 in words is "thirty-six million, five hundred forty thousand, nine hundred twenty-one".