102731141 has 4 divisors (see below), whose sum is σ = 103055532. Its totient is φ = 102406752.

The previous prime is 102731113. The next prime is 102731149. The reversal of 102731141 is 141137201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1809025 + 100922116 = 1345^2 + 10046^2 .

It is a cyclic number.

It is not a de Polignac number, because 102731141 - 2²⁶ = 35622277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102731149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161720 + ... + 162353.

It is an arithmetic number, because the mean of its divisors is an integer number (25763883).

Almost surely, 2^102731141 is an apocalyptic number.

It is an amenable number.

102731141 is a deficient number, since it is larger than the sum of its proper divisors (324391).

102731141 is an equidigital number, since it uses as much as digits as its factorization.

102731141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324390.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 102731141 is about 10135.6371777999. The cubic root of 102731141 is about 468.3465986907.

Adding to 102731141 its reverse (141137201), we get a palindrome (243868342).

The spelling of 102731141 in words is "one hundred two million, seven hundred thirty-one thousand, one hundred forty-one".