36145621 has 4 divisors (see below), whose sum is σ = 38271852. Its totient is φ = 34019392.

The previous prime is 36145607. The next prime is 36145661. The reversal of 36145621 is 12654163.

36145621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12654163 = 23 ⋅550181.

It can be written as a sum of positive squares in 2 ways, for example, as 33292900 + 2852721 = 5770^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 36145621 - 2¹¹ = 36143573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36145621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36145601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063090 + ... + 1063123.

It is an arithmetic number, because the mean of its divisors is an integer number (9567963).

Almost surely, 2^36145621 is an apocalyptic number.

It is an amenable number.

36145621 is a deficient number, since it is larger than the sum of its proper divisors (2126231).

36145621 is a wasteful number, since it uses less digits than its factorization.

36145621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126230.

The product of its digits is 4320, while the sum is 28.

The square root of 36145621 is about 6012.1228364031. The cubic root of 36145621 is about 330.6373388500.

Adding to 36145621 its reverse (12654163), we get a palindrome (48799784).

The spelling of 36145621 in words is "thirty-six million, one hundred forty-five thousand, six hundred twenty-one".