102540071 has 4 divisors (see below), whose sum is σ = 102744432. Its totient is φ = 102335712.

The previous prime is 102540047. The next prime is 102540077. The reversal of 102540071 is 170045201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170045201 = 47 ⋅3617983.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102540071 is a prime.

It is a super-3 number, since 3×102540071³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102540077) 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 in 3 ways as a sum of consecutive naturals, for example, 101426 + ... + 102431.

It is an arithmetic number, because the mean of its divisors is an integer number (25686108).

Almost surely, 2^102540071 is an apocalyptic number.

102540071 is a deficient number, since it is larger than the sum of its proper divisors (204361).

102540071 is an equidigital number, since it uses as much as digits as its factorization.

102540071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204360.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 102540071 is about 10126.2071379169. The cubic root of 102540071 is about 468.0560586780.

Adding to 102540071 its reverse (170045201), we get a palindrome (272585272).

The spelling of 102540071 in words is "one hundred two million, five hundred forty thousand, seventy-one".