1201321465 has 4 divisors (see below), whose sum is σ = 1441585764. Its totient is φ = 961057168.

The previous prime is 1201321427. The next prime is 1201321477. The reversal of 1201321465 is 5641231021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5641231021 = 27611 ⋅204311.

It can be written as a sum of positive squares in 2 ways, for example, as 383533056 + 817788409 = 19584^2 + 28597^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201321465 - 2¹³ = 1201313273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120132142 + ... + 120132151.

It is an arithmetic number, because the mean of its divisors is an integer number (360396441).

Almost surely, 2^1201321465 is an apocalyptic number.

It is an amenable number.

1201321465 is a deficient number, since it is larger than the sum of its proper divisors (240264299).

1201321465 is an equidigital number, since it uses as much as digits as its factorization.

1201321465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240264298.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1201321465 is about 34660.0846075136. The cubic root of 1201321465 is about 1063.0485000027.

Adding to 1201321465 its reverse (5641231021), we get a palindrome (6842552486).

The spelling of 1201321465 in words is "one billion, two hundred one million, three hundred twenty-one thousand, four hundred sixty-five".