102540541 has 4 divisors (see below), whose sum is σ = 102578112. Its totient is φ = 102502972.

The previous prime is 102540539. The next prime is 102540589. The reversal of 102540541 is 145045201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145045201 = 7 ⋅20720743.

It is a cyclic number.

It is not a de Polignac number, because 102540541 - 2¹ = 102540539 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 (102540241) 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, 14341 + ... + 20266.

It is an arithmetic number, because the mean of its divisors is an integer number (25644528).

Almost surely, 2^102540541 is an apocalyptic number.

It is an amenable number.

102540541 is a deficient number, since it is larger than the sum of its proper divisors (37571).

102540541 is an equidigital number, since it uses as much as digits as its factorization.

102540541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37570.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 102540541 is about 10126.2303450001. The cubic root of 102540541 is about 468.0567738001.

Adding to 102540541 its reverse (145045201), we get a palindrome (247585742).

The spelling of 102540541 in words is "one hundred two million, five hundred forty thousand, five hundred forty-one".