102145161 has 4 divisors (see below), whose sum is σ = 136193552. Its totient is φ = 68096772.

The previous prime is 102145157. The next prime is 102145189. The reversal of 102145161 is 161541201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161541201 = 3 ⋅53847067.

It is not a de Polignac number, because 102145161 - 2² = 102145157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102145661) 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, 17024191 + ... + 17024196.

It is an arithmetic number, because the mean of its divisors is an integer number (34048388).

Almost surely, 2^102145161 is an apocalyptic number.

It is an amenable number.

102145161 is a deficient number, since it is larger than the sum of its proper divisors (34048391).

102145161 is an equidigital number, since it uses as much as digits as its factorization.

102145161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34048390.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 102145161 is about 10106.6889236782. The cubic root of 102145161 is about 467.4544148027.

Adding to 102145161 its reverse (161541201), we get a palindrome (263686362).

The spelling of 102145161 in words is "one hundred two million, one hundred forty-five thousand, one hundred sixty-one".