102404161 has 4 divisors (see below), whose sum is σ = 103459972. Its totient is φ = 101348352.

The previous prime is 102404153. The next prime is 102404171. The reversal of 102404161 is 161404201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161404201 = 7 ⋅23057743.

It can be written as a sum of positive squares in 2 ways, for example, as 46991025 + 55413136 = 6855^2 + 7444^2 .

It is a cyclic number.

It is not a de Polignac number, because 102404161 - 2³ = 102404153 is a prime.

It is a super-2 number, since 2×102404161² = 20973224380227842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102404171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527760 + ... + 527953.

It is an arithmetic number, because the mean of its divisors is an integer number (25864993).

Almost surely, 2^102404161 is an apocalyptic number.

It is an amenable number.

102404161 is a deficient number, since it is larger than the sum of its proper divisors (1055811).

102404161 is an equidigital number, since it uses as much as digits as its factorization.

102404161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055810.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 102404161 is about 10119.4941079088. The cubic root of 102404161 is about 467.8491749229.

Adding to 102404161 its reverse (161404201), we get a palindrome (263808362).

The spelling of 102404161 in words is "one hundred two million, four hundred four thousand, one hundred sixty-one".