102539455 has 4 divisors (see below), whose sum is σ = 123047352. Its totient is φ = 82031560.

The previous prime is 102539453. The next prime is 102539467. The reversal of 102539455 is 554935201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554935201 = 557 ⋅996293.

It is not a de Polignac number, because 102539455 - 2¹ = 102539453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102539455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102539453) 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, 10253941 + ... + 10253950.

It is an arithmetic number, because the mean of its divisors is an integer number (30761838).

Almost surely, 2^102539455 is an apocalyptic number.

102539455 is a deficient number, since it is larger than the sum of its proper divisors (20507897).

102539455 is an equidigital number, since it uses as much as digits as its factorization.

102539455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20507896.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 102539455 is about 10126.1767217445. The cubic root of 102539455 is about 468.0551214082.

The spelling of 102539455 in words is "one hundred two million, five hundred thirty-nine thousand, four hundred fifty-five".