36426721 has 4 divisors (see below), whose sum is σ = 36836100. Its totient is φ = 36017344.

The previous prime is 36426713. The next prime is 36426727. The reversal of 36426721 is 12762463.

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 14440000 + 21986721 = 3800^2 + 4689^2 .

It is a cyclic number.

It is not a de Polignac number, because 36426721 - 2³ = 36426713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36426727) 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, 204556 + ... + 204733.

It is an arithmetic number, because the mean of its divisors is an integer number (9209025).

Almost surely, 2^36426721 is an apocalyptic number.

It is an amenable number.

36426721 is a deficient number, since it is larger than the sum of its proper divisors (409379).

36426721 is an equidigital number, since it uses as much as digits as its factorization.

36426721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409378.

The product of its digits is 12096, while the sum is 31.

The square root of 36426721 is about 6035.4553266510. The cubic root of 36426721 is about 331.4922350152.

The spelling of 36426721 in words is "thirty-six million, four hundred twenty-six thousand, seven hundred twenty-one".