36405521 has 8 divisors (see below), whose sum is σ = 37464960. Its totient is φ = 35350128.

The previous prime is 36405511. The next prime is 36405529. The reversal of 36405521 is 12550463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36405521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36405529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34520 + ... + 35558.

It is an arithmetic number, because the mean of its divisors is an integer number (4683120).

Almost surely, 2^36405521 is an apocalyptic number.

It is an amenable number.

36405521 is a deficient number, since it is larger than the sum of its proper divisors (1059439).

36405521 is a wasteful number, since it uses less digits than its factorization.

36405521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023.

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

The square root of 36405521 is about 6033.6987826705. The cubic root of 36405521 is about 331.4279141085.

Adding to 36405521 its reverse (12550463), we get a palindrome (48955984).

The spelling of 36405521 in words is "thirty-six million, four hundred five thousand, five hundred twenty-one".