1331205404 has 12 divisors (see below), whose sum is σ = 2351382264. Its totient is φ = 659381904.

The previous prime is 1331205401. The next prime is 1331205409. The reversal of 1331205404 is 4045021331.

It is a self number, because there is not a number n which added to its sum of digits gives 1331205404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331205401) 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, 1554719 + ... + 1555574.

It is an arithmetic number, because the mean of its divisors is an integer number (195948522).

Almost surely, 2^1331205404 is an apocalyptic number.

It is an amenable number.

1331205404 is a deficient number, since it is larger than the sum of its proper divisors (1020176860).

1331205404 is a wasteful number, since it uses less digits than its factorization.

1331205404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110404 (or 3110402 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1331205404 is about 36485.6876596838. The cubic root of 1331205404 is about 1100.0565822134.

Adding to 1331205404 its reverse (4045021331), we get a palindrome (5376226735).

The spelling of 1331205404 in words is "one billion, three hundred thirty-one million, two hundred five thousand, four hundred four".