1155207270 has 32 divisors (see below), whose sum is σ = 3168569088. Its totient is φ = 264047328.

The previous prime is 1155207259. The next prime is 1155207293. The reversal of 1155207270 is 727025511.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2750284 + ... + 2750703.

It is an arithmetic number, because the mean of its divisors is an integer number (99017784).

Almost surely, 2^1155207270 is an apocalyptic number.

1155207270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155207270 is an abundant number, since it is smaller than the sum of its proper divisors (2013361818).

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

1155207270 is a wasteful number, since it uses less digits than its factorization.

1155207270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5501004.

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 1155207270 is about 33988.3402066061. The cubic root of 1155207270 is about 1049.2685063886.

The spelling of 1155207270 in words is "one billion, one hundred fifty-five million, two hundred seven thousand, two hundred seventy".