1155431204 has 6 divisors (see below), whose sum is σ = 2022004614. Its totient is φ = 577715600.

The previous prime is 1155431203. The next prime is 1155431219. The reversal of 1155431204 is 4021345511.

It can be written as a sum of positive squares in only one way, i.e., 815102500 + 340328704 = 28550^2 + 18448^2 .

It is not an unprimeable number, because it can be changed into a prime (1155431203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144428897 + ... + 144428904.

It is an arithmetic number, because the mean of its divisors is an integer number (337000769).

Almost surely, 2^1155431204 is an apocalyptic number.

It is an amenable number.

1155431204 is a deficient number, since it is larger than the sum of its proper divisors (866573410).

1155431204 is a wasteful number, since it uses less digits than its factorization.

1155431204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288857805 (or 288857803 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1155431204 is about 33991.6343237568. The cubic root of 1155431204 is about 1049.3363013546.

Adding to 1155431204 its reverse (4021345511), we get a palindrome (5176776715).

The spelling of 1155431204 in words is "one billion, one hundred fifty-five million, four hundred thirty-one thousand, two hundred four".