1162891221 has 8 divisors (see below), whose sum is σ = 1559184480. Its totient is φ = 770929392.

The previous prime is 1162891217. The next prime is 1162891231. The reversal of 1162891221 is 1221982611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1162891221 - 2² = 1162891217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1162891231) 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, 1082230 + ... + 1083303.

It is an arithmetic number, because the mean of its divisors is an integer number (194898060).

Almost surely, 2^1162891221 is an apocalyptic number.

It is an amenable number.

1162891221 is a deficient number, since it is larger than the sum of its proper divisors (396293259).

1162891221 is a wasteful number, since it uses less digits than its factorization.

1162891221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165715.

The product of its digits is 3456, while the sum is 33.

The square root of 1162891221 is about 34101.1909029582. The cubic root of 1162891221 is about 1051.5897975796.

The spelling of 1162891221 in words is "one billion, one hundred sixty-two million, eight hundred ninety-one thousand, two hundred twenty-one".