1322201645 has 4 divisors (see below), whose sum is σ = 1586641980. Its totient is φ = 1057761312.

The previous prime is 1322201641. The next prime is 1322201663. The reversal of 1322201645 is 5461022231.

It is a happy number.

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 925315561 + 396886084 = 30419^2 + 19922^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322201645 - 2² = 1322201641 is a prime.

It is a super-3 number, since 3×1322201645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322201641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132220160 + ... + 132220169.

It is an arithmetic number, because the mean of its divisors is an integer number (396660495).

Almost surely, 2^1322201645 is an apocalyptic number.

It is an amenable number.

1322201645 is a deficient number, since it is larger than the sum of its proper divisors (264440335).

1322201645 is an equidigital number, since it uses as much as digits as its factorization.

1322201645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264440334.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1322201645 is about 36362.0907677213. The cubic root of 1322201645 is about 1097.5708503580.

Adding to 1322201645 its reverse (5461022231), we get a palindrome (6783223876).

The spelling of 1322201645 in words is "one billion, three hundred twenty-two million, two hundred one thousand, six hundred forty-five".