102421049 has 2 divisors, whose sum is σ = 102421050. Its totient is φ = 102421048.

The previous prime is 102421043. The next prime is 102421057. The reversal of 102421049 is 940124201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60171049 + 42250000 = 7757^2 + 6500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102421049 is a prime.

It is not a weakly prime, because it can be changed into another prime (102421043) 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, 51210524 + 51210525.

It is an arithmetic number, because the mean of its divisors is an integer number (51210525).

Almost surely, 2^102421049 is an apocalyptic number.

It is an amenable number.

102421049 is a deficient number, since it is larger than the sum of its proper divisors (1).

102421049 is an equidigital number, since it uses as much as digits as its factorization.

102421049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 102421049 is about 10120.3285025734. The cubic root of 102421049 is about 467.8748919852.

The spelling of 102421049 in words is "one hundred two million, four hundred twenty-one thousand, forty-nine".