12161098 has 4 divisors (see below), whose sum is σ = 18241650. Its totient is φ = 6080548.

The previous prime is 12161053. The next prime is 12161099. The reversal of 12161098 is 89016121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89016121 = 19 ⋅4685059.

It can be written as a sum of positive squares in only one way, i.e., 8982009 + 3179089 = 2997^2 + 1783^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12161099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3040273 + ... + 3040276.

Almost surely, 2^12161098 is an apocalyptic number.

12161098 is a deficient number, since it is larger than the sum of its proper divisors (6080552).

12161098 is an equidigital number, since it uses as much as digits as its factorization.

12161098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6080551.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 12161098 is about 3487.2765878261. The cubic root of 12161098 is about 229.9628043190.

The spelling of 12161098 in words is "twelve million, one hundred sixty-one thousand, ninety-eight".