1161331004 has 12 divisors (see below), whose sum is σ = 2038155000. Its totient is φ = 579001008.

The previous prime is 1161331001. The next prime is 1161331049. The reversal of 1161331004 is 4001331611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161331001) 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, 414554 + ... + 417345.

It is an arithmetic number, because the mean of its divisors is an integer number (169846250).

Almost surely, 2^1161331004 is an apocalyptic number.

It is an amenable number.

1161331004 is a deficient number, since it is larger than the sum of its proper divisors (876823996).

1161331004 is a wasteful number, since it uses less digits than its factorization.

1161331004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832252 (or 832250 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1161331004 is about 34078.3069415134. The cubic root of 1161331004 is about 1051.1192913790.

Adding to 1161331004 its reverse (4001331611), we get a palindrome (5162662615).

The spelling of 1161331004 in words is "one billion, one hundred sixty-one million, three hundred thirty-one thousand, four".