1155211004 has 12 divisors (see below), whose sum is σ = 2035008528. Its totient is φ = 573780000.

The previous prime is 1155210983. The next prime is 1155211007. The reversal of 1155211004 is 4001125511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155211007) 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, 955697 + ... + 956904.

It is an arithmetic number, because the mean of its divisors is an integer number (169584044).

Almost surely, 2^1155211004 is an apocalyptic number.

It is an amenable number.

1155211004 is a deficient number, since it is larger than the sum of its proper divisors (879797524).

1155211004 is a wasteful number, since it uses less digits than its factorization.

1155211004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912756 (or 1912754 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1155211004 is about 33988.3951371641. The cubic root of 1155211004 is about 1049.2696369114.

Adding to 1155211004 its reverse (4001125511), we get a palindrome (5156336515).

The spelling of 1155211004 in words is "one billion, one hundred fifty-five million, two hundred eleven thousand, four".