1097161 has 8 divisors (see below), whose sum is σ = 1214024. Its totient is φ = 984960.

The previous prime is 1097147. The next prime is 1097179. The reversal of 1097161 is 1617901.

It can be written as a sum of positive squares in 4 ways, for example, as 230400 + 866761 = 480^2 + 931^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1097161 is a prime.

It is a Duffinian number.

1097161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1097101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660 + ... + 1621.

It is an arithmetic number, because the mean of its divisors is an integer number (151753).

2^1097161 is an apocalyptic number.

It is an amenable number.

1097161 is a deficient number, since it is larger than the sum of its proper divisors (116863).

1097161 is a wasteful number, since it uses less digits than its factorization.

1097161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 1097161 is about 1047.4545336195. The cubic root of 1097161 is about 103.1391276635.

The spelling of 1097161 in words is "one million, ninety-seven thousand, one hundred sixty-one".