102450409 has 2 divisors, whose sum is σ = 102450410. Its totient is φ = 102450408.

The previous prime is 102450407. The next prime is 102450479. The reversal of 102450409 is 904054201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101505625 + 944784 = 10075^2 + 972^2 .

It is an emirp because it is prime and its reverse (904054201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102450409 - 2¹ = 102450407 is a prime.

Together with 102450407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (102450407) 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 as a sum of consecutive naturals, namely, 51225204 + 51225205.

It is an arithmetic number, because the mean of its divisors is an integer number (51225205).

Almost surely, 2^102450409 is an apocalyptic number.

It is an amenable number.

102450409 is a deficient number, since it is larger than the sum of its proper divisors (1).

102450409 is an equidigital number, since it uses as much as digits as its factorization.

102450409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 102450409 is about 10121.7789444346. The cubic root of 102450409 is about 467.9195946923.

The spelling of 102450409 in words is "one hundred two million, four hundred fifty thousand, four hundred nine".