1321204255 has 8 divisors (see below), whose sum is σ = 1811937312. Its totient is φ = 905968608.

The previous prime is 1321204229. The next prime is 1321204259. The reversal of 1321204255 is 5524021231.

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 1321204255 - 2¹⁷ = 1321073183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321204259) 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, 18874312 + ... + 18874381.

It is an arithmetic number, because the mean of its divisors is an integer number (226492164).

Almost surely, 2^1321204255 is an apocalyptic number.

1321204255 is a deficient number, since it is larger than the sum of its proper divisors (490733057).

1321204255 is an equidigital number, since it uses as much as digits as its factorization.

1321204255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37748705.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1321204255 is about 36348.3734849305. The cubic root of 1321204255 is about 1097.2948002889.

Adding to 1321204255 its reverse (5524021231), we get a palindrome (6845225486).

The spelling of 1321204255 in words is "one billion, three hundred twenty-one million, two hundred four thousand, two hundred fifty-five".