1155567120 has 40 divisors (see below), whose sum is σ = 3582258816. Its totient is φ = 308151168.

The previous prime is 1155567073. The next prime is 1155567121. The reversal of 1155567120 is 217655511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1155567121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2407192 + ... + 2407671.

Almost surely, 2^1155567120 is an apocalyptic number.

1155567120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155567120 is an abundant number, since it is smaller than the sum of its proper divisors (2426691696).

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

1155567120 is a wasteful number, since it uses less digits than its factorization.

1155567120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4814879 (or 4814873 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 33.

The square root of 1155567120 is about 33993.6335215875. The cubic root of 1155567120 is about 1049.3774450131.

The spelling of 1155567120 in words is "one billion, one hundred fifty-five million, five hundred sixty-seven thousand, one hundred twenty".