102402449 has 2 divisors, whose sum is σ = 102402450. Its totient is φ = 102402448.

The previous prime is 102402439. The next prime is 102402481. The reversal of 102402449 is 944204201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55726225 + 46676224 = 7465^2 + 6832^2 .

It is an emirp because it is prime and its reverse (944204201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102402449 - 2⁸ = 102402193 is a prime.

It is a super-2 number, since 2×102402449² = 20972523122395202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102402439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51201224 + 51201225.

It is an arithmetic number, because the mean of its divisors is an integer number (51201225).

Almost surely, 2^102402449 is an apocalyptic number.

It is an amenable number.

102402449 is a deficient number, since it is larger than the sum of its proper divisors (1).

102402449 is an equidigital number, since it uses as much as digits as its factorization.

102402449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 102402449 is about 10119.4095183464. The cubic root of 102402449 is about 467.8465677299.

The spelling of 102402449 in words is "one hundred two million, four hundred two thousand, four hundred forty-nine".