102542131 has 2 divisors, whose sum is σ = 102542132. Its totient is φ = 102542130.

The previous prime is 102542129. The next prime is 102542161. The reversal of 102542131 is 131245201.

It is a weak prime.

It is an emirp because it is prime and its reverse (131245201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102542131 - 2¹ = 102542129 is a prime.

It is a super-2 number, since 2×102542131² = 21029777260042322, which contains 22 as substring.

Together with 102542129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 102542099 and 102542108.

It is not a weakly prime, because it can be changed into another prime (102542161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51271065 + 51271066.

It is an arithmetic number, because the mean of its divisors is an integer number (51271066).

Almost surely, 2^102542131 is an apocalyptic number.

102542131 is a deficient number, since it is larger than the sum of its proper divisors (1).

102542131 is an equidigital number, since it uses as much as digits as its factorization.

102542131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 102542131 is about 10126.3088536742. The cubic root of 102542131 is about 468.0591930267.

Adding to 102542131 its reverse (131245201), we get a palindrome (233787332).

The spelling of 102542131 in words is "one hundred two million, five hundred forty-two thousand, one hundred thirty-one".