1161151270 has 16 divisors (see below), whose sum is σ = 2125498320. Its totient is φ = 456588064.

The previous prime is 1161151241. The next prime is 1161151319. The reversal of 1161151270 is 721511611.

It is a super-2 number, since 2×1161151270² = 2696544543645225800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 983437 + ... + 984616.

It is an arithmetic number, because the mean of its divisors is an integer number (132843645).

Almost surely, 2^1161151270 is an apocalyptic number.

1161151270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161151270 is a deficient number, since it is larger than the sum of its proper divisors (964347050).

1161151270 is a wasteful number, since it uses less digits than its factorization.

1161151270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968119.

The product of its (nonzero) digits is 420, while the sum is 25.

The square root of 1161151270 is about 34075.6697659782. The cubic root of 1161151270 is about 1051.0650629058.

Adding to 1161151270 its reverse (721511611), we get a palindrome (1882662881).

The spelling of 1161151270 in words is "one billion, one hundred sixty-one million, one hundred fifty-one thousand, two hundred seventy".