102445121 has 2 divisors, whose sum is σ = 102445122. Its totient is φ = 102445120.

The previous prime is 102445103. The next prime is 102445127. The reversal of 102445121 is 121544201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71487025 + 30958096 = 8455^2 + 5564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102445121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102445093 and 102445102.

It is not a weakly prime, because it can be changed into another prime (102445127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51222560 + 51222561.

It is an arithmetic number, because the mean of its divisors is an integer number (51222561).

Almost surely, 2^102445121 is an apocalyptic number.

It is an amenable number.

102445121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102445121 is an equidigital number, since it uses as much as digits as its factorization.

102445121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 102445121 is about 10121.5177221601. The cubic root of 102445121 is about 467.9115439634.

Adding to 102445121 its reverse (121544201), we get a palindrome (223989322).

The spelling of 102445121 in words is "one hundred two million, four hundred forty-five thousand, one hundred twenty-one".