102142647 has 16 divisors (see below), whose sum is σ = 160224480. Its totient is φ = 64089216.

The previous prime is 102142643. The next prime is 102142661. The reversal of 102142647 is 746241201.

102142647 is a `hidden beast` number, since 1 + 0 + 2 + 14 + 2 + 647 = 666.

It is not a de Polignac number, because 102142647 - 2² = 102142643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 102142647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102142643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110808 + ... + 111725.

It is an arithmetic number, because the mean of its divisors is an integer number (10014030).

Almost surely, 2^102142647 is an apocalyptic number.

102142647 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

102142647 is a deficient number, since it is larger than the sum of its proper divisors (58081833).

102142647 is a wasteful number, since it uses less digits than its factorization.

102142647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222559 (or 222553 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 102142647 is about 10106.5645498359. The cubic root of 102142647 is about 467.4505797702.

Adding to 102142647 its reverse (746241201), we get a palindrome (848383848).

The spelling of 102142647 in words is "one hundred two million, one hundred forty-two thousand, six hundred forty-seven".