102545161 has 4 divisors (see below), whose sum is σ = 102702852. Its totient is φ = 102387472.

The previous prime is 102545143. The next prime is 102545171. The reversal of 102545161 is 161545201.

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: 161545201 = 19 ⋅8502379.

It can be written as a sum of positive squares in 2 ways, for example, as 42575625 + 59969536 = 6525^2 + 7744^2 .

It is a cyclic number.

It is not a de Polignac number, because 102545161 - 2¹¹ = 102543113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102545171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77866 + ... + 79171.

It is an arithmetic number, because the mean of its divisors is an integer number (25675713).

Almost surely, 2^102545161 is an apocalyptic number.

It is an amenable number.

102545161 is a deficient number, since it is larger than the sum of its proper divisors (157691).

102545161 is an equidigital number, since it uses as much as digits as its factorization.

102545161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157690.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 102545161 is about 10126.4584628586. The cubic root of 102545161 is about 468.0638031818.

The spelling of 102545161 in words is "one hundred two million, five hundred forty-five thousand, one hundred sixty-one".