102144425 has 6 divisors (see below), whose sum is σ = 126659118. Its totient is φ = 81715520.

The previous prime is 102144421. The next prime is 102144443. The reversal of 102144425 is 524441201.

It can be written as a sum of positive squares in 3 ways, for example, as 22202944 + 79941481 = 4712^2 + 8941^2 .

It is not a de Polignac number, because 102144425 - 2² = 102144421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102144425.

It is not an unprimeable number, because it can be changed into a prime (102144421) 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 5 ways as a sum of consecutive naturals, for example, 2042864 + ... + 2042913.

It is an arithmetic number, because the mean of its divisors is an integer number (21109853).

Almost surely, 2^102144425 is an apocalyptic number.

It is an amenable number.

102144425 is a deficient number, since it is larger than the sum of its proper divisors (24514693).

102144425 is an equidigital number, since it uses as much as digits as its factorization.

102144425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4085787 (or 4085782 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 102144425 is about 10106.6525120833. The cubic root of 102144425 is about 467.4532920630.

Adding to 102144425 its reverse (524441201), we get a palindrome (626585626).

The spelling of 102144425 in words is "one hundred two million, one hundred forty-four thousand, four hundred twenty-five".