36505421 has 4 divisors (see below), whose sum is σ = 37492092. Its totient is φ = 35518752.

The previous prime is 36505379. The next prime is 36505429. The reversal of 36505421 is 12450563.

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 24157225 + 12348196 = 4915^2 + 3514^2 .

It is a cyclic number.

It is not a de Polignac number, because 36505421 - 2¹⁰ = 36504397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36505429) 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, 493280 + ... + 493353.

It is an arithmetic number, because the mean of its divisors is an integer number (9373023).

Almost surely, 2^36505421 is an apocalyptic number.

It is an amenable number.

36505421 is a deficient number, since it is larger than the sum of its proper divisors (986671).

36505421 is an equidigital number, since it uses as much as digits as its factorization.

36505421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986670.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 36505421 is about 6041.9716152925. The cubic root of 36505421 is about 331.7307931639.

Adding to 36505421 its reverse (12450563), we get a palindrome (48955984).

The spelling of 36505421 in words is "thirty-six million, five hundred five thousand, four hundred twenty-one".