1022491161 has 16 divisors (see below), whose sum is σ = 1516792320. Its totient is φ = 680765040.

The previous prime is 1022491111. The next prime is 1022491199. The reversal of 1022491161 is 1611942201.

1022491161 is a `hidden beast` number, since 10 + 2 + 2 + 491 + 161 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1022491161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1022491111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3625 + ... + 45366.

It is an arithmetic number, because the mean of its divisors is an integer number (94799520).

Almost surely, 2^1022491161 is an apocalyptic number.

It is an amenable number.

1022491161 is a deficient number, since it is larger than the sum of its proper divisors (494301159).

1022491161 is an equidigital number, since it uses as much as digits as its factorization.

1022491161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49773 (or 49767 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1022491161 is about 31976.4156996997. The cubic root of 1022491161 is about 1007.4415397900.

The spelling of 1022491161 in words is "one billion, twenty-two million, four hundred ninety-one thousand, one hundred sixty-one".