36540421 has 4 divisors (see below), whose sum is σ = 36574252. Its totient is φ = 36506592.

The previous prime is 36540419. The next prime is 36540433. The reversal of 36540421 is 12404563.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8767521 + 27772900 = 2961^2 + 5270^2 .

It is a cyclic number.

It is not a de Polignac number, because 36540421 - 2¹ = 36540419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36540121) 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, 15240 + ... + 17473.

It is an arithmetic number, because the mean of its divisors is an integer number (9143563).

Almost surely, 2^36540421 is an apocalyptic number.

It is an amenable number.

36540421 is a deficient number, since it is larger than the sum of its proper divisors (33831).

36540421 is a wasteful number, since it uses less digits than its factorization.

36540421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33830.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 36540421 is about 6044.8673269146. The cubic root of 36540421 is about 331.8367762282.

Adding to 36540421 its reverse (12404563), we get a palindrome (48944984).

The spelling of 36540421 in words is "thirty-six million, five hundred forty thousand, four hundred twenty-one".