1231603304 has 8 divisors (see below), whose sum is σ = 2309256210. Its totient is φ = 615801648.

The previous prime is 1231603279. The next prime is 1231603343. The reversal of 1231603304 is 4033061321.

It can be written as a sum of positive squares in only one way, i.e., 1210900804 + 20702500 = 34798^2 + 4550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1231603304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76975199 + ... + 76975214.

Almost surely, 2^1231603304 is an apocalyptic number.

It is an amenable number.

1231603304 is a deficient number, since it is larger than the sum of its proper divisors (1077652906).

1231603304 is a wasteful number, since it uses less digits than its factorization.

1231603304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153950419 (or 153950415 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1231603304 is about 35094.2061314970. The cubic root of 1231603304 is about 1071.9066085010.

Adding to 1231603304 its reverse (4033061321), we get a palindrome (5264664625).

The spelling of 1231603304 in words is "one billion, two hundred thirty-one million, six hundred three thousand, three hundred four".