1436441221 has 8 divisors (see below), whose sum is σ = 1472486040. Its totient is φ = 1400838912.

The previous prime is 1436441219. The next prime is 1436441261. The reversal of 1436441221 is 1221446341.

It can be written as a sum of positive squares in 4 ways, for example, as 304118721 + 1132322500 = 17439^2 + 33650^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1436441221 - 2¹ = 1436441219 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 1436441221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1436441261) 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, 104050 + ... + 117043.

It is an arithmetic number, because the mean of its divisors is an integer number (184060755).

Almost surely, 2^1436441221 is an apocalyptic number.

It is an amenable number.

1436441221 is a deficient number, since it is larger than the sum of its proper divisors (36044819).

1436441221 is an equidigital number, since it uses as much as digits as its factorization.

1436441221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221255.

The product of its digits is 4608, while the sum is 28.

The square root of 1436441221 is about 37900.4118843054. The cubic root of 1436441221 is about 1128.3122063574.

Adding to 1436441221 its reverse (1221446341), we get a palindrome (2657887562).

The spelling of 1436441221 in words is "one billion, four hundred thirty-six million, four hundred forty-one thousand, two hundred twenty-one".