1255448321 has 4 divisors (see below), whose sum is σ = 1259459652. Its totient is φ = 1251436992.

The previous prime is 1255448297. The next prime is 1255448333. The reversal of 1255448321 is 1238445521.

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 147889921 + 1107558400 = 12161^2 + 33280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255448321 - 2¹⁴ = 1255431937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255448021) 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, 2005196 + ... + 2005821.

It is an arithmetic number, because the mean of its divisors is an integer number (314864913).

Almost surely, 2^1255448321 is an apocalyptic number.

It is an amenable number.

1255448321 is a deficient number, since it is larger than the sum of its proper divisors (4011331).

1255448321 is an equidigital number, since it uses as much as digits as its factorization.

1255448321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4011330.

The product of its digits is 38400, while the sum is 35.

The square root of 1255448321 is about 35432.3061767083. The cubic root of 1255448321 is about 1078.7801502019.

The spelling of 1255448321 in words is "one billion, two hundred fifty-five million, four hundred forty-eight thousand, three hundred twenty-one".