102242549 has 2 divisors, whose sum is σ = 102242550. Its totient is φ = 102242548.

The previous prime is 102242537. The next prime is 102242551. The reversal of 102242549 is 945242201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100140049 + 2102500 = 10007^2 + 1450^2 .

It is a cyclic number.

It is not a de Polignac number, because 102242549 - 2²⁰ = 101193973 is a prime.

Together with 102242551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102242579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51121274 + 51121275.

It is an arithmetic number, because the mean of its divisors is an integer number (51121275).

Almost surely, 2^102242549 is an apocalyptic number.

It is an amenable number.

102242549 is a deficient number, since it is larger than the sum of its proper divisors (1).

102242549 is an equidigital number, since it uses as much as digits as its factorization.

102242549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 102242549 is about 10111.5057731280. The cubic root of 102242549 is about 467.6029289032.

The spelling of 102242549 in words is "one hundred two million, two hundred forty-two thousand, five hundred forty-nine".