102142247 has 2 divisors, whose sum is σ = 102142248. Its totient is φ = 102142246.

The previous prime is 102142217. The next prime is 102142253. The reversal of 102142247 is 742241201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102142247 - 2¹⁰ = 102141223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102142217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51071123 + 51071124.

It is an arithmetic number, because the mean of its divisors is an integer number (51071124).

Almost surely, 2^102142247 is an apocalyptic number.

102142247 is a deficient number, since it is larger than the sum of its proper divisors (1).

102142247 is an equidigital number, since it uses as much as digits as its factorization.

102142247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 102142247 is about 10106.5447606984. The cubic root of 102142247 is about 467.4499695763.

Adding to 102142247 its reverse (742241201), we get a palindrome (844383448).

The spelling of 102142247 in words is "one hundred two million, one hundred forty-two thousand, two hundred forty-seven".