1255320001 has 24 divisors (see below), whose sum is σ = 1474512984. Its totient is φ = 1063895040.

The previous prime is 1255319969. The next prime is 1255320007. The reversal of 1255320001 is 1000235521.

It can be written as a sum of positive squares in 12 ways, for example, as 1085043600 + 170276401 = 32940^2 + 13049^2 .

It is not a de Polignac number, because 1255320001 - 2⁵ = 1255319969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255320007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112465 + ... + 123121.

It is an arithmetic number, because the mean of its divisors is an integer number (61438041).

Almost surely, 2^1255320001 is an apocalyptic number.

It is an amenable number.

1255320001 is a deficient number, since it is larger than the sum of its proper divisors (219192983).

1255320001 is a wasteful number, since it uses less digits than its factorization.

1255320001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10741 (or 10728 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1255320001 is about 35430.4953535792. The cubic root of 1255320001 is about 1078.7433947303.

Adding to 1255320001 its reverse (1000235521), we get a palindrome (2255555522).

The spelling of 1255320001 in words is "one billion, two hundred fifty-five million, three hundred twenty thousand, one".