102142 has 4 divisors (see below), whose sum is σ = 153216. Its totient is φ = 51070.

The previous prime is 102139. The next prime is 102149. The reversal of 102142 is 241201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241201 = 23 ⋅10487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25534 + ... + 25537.

It is an arithmetic number, because the mean of its divisors is an integer number (38304).

2¹⁰²¹⁴² is an apocalyptic number.

102142 is a deficient number, since it is larger than the sum of its proper divisors (51074).

102142 is an equidigital number, since it uses as much as digits as its factorization.

102142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51073.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 102142 is about 319.5966207581. The cubic root of 102142 is about 46.7449592781.

Adding to 102142 its reverse (241201), we get a palindrome (343343).

The spelling of 102142 in words is "one hundred two thousand, one hundred forty-two", and thus it is an iban number.