1311155004 has 12 divisors (see below), whose sum is σ = 3059361704. Its totient is φ = 437051664.

The previous prime is 1311155003. The next prime is 1311155017. The reversal of 1311155004 is 4005511131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311155003) 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, 54631447 + ... + 54631470.

Almost surely, 2^1311155004 is an apocalyptic number.

It is an amenable number.

1311155004 is an abundant number, since it is smaller than the sum of its proper divisors (1748206700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311155004 is a wasteful number, since it uses less digits than its factorization.

1311155004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109262924 (or 109262922 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1311155004 is about 36209.8743991194. The cubic root of 1311155004 is about 1094.5056612283.

Adding to 1311155004 its reverse (4005511131), we get a palindrome (5316666135).

The spelling of 1311155004 in words is "one billion, three hundred eleven million, one hundred fifty-five thousand, four".