102532439 has 4 divisors (see below), whose sum is σ = 105303624. Its totient is φ = 99761256.

The previous prime is 102532433. The next prime is 102532447. The reversal of 102532439 is 934235201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934235201 = 313 ⋅2984777.

It is a cyclic number.

It is not a de Polignac number, because 102532439 - 2²⁴ = 85755223 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 (102532433) 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, 1385537 + ... + 1385610.

It is an arithmetic number, because the mean of its divisors is an integer number (26325906).

Almost surely, 2^102532439 is an apocalyptic number.

102532439 is a deficient number, since it is larger than the sum of its proper divisors (2771185).

102532439 is an equidigital number, since it uses as much as digits as its factorization.

102532439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771184.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 102532439 is about 10125.8302869444. The cubic root of 102532439 is about 468.0444460065.

The spelling of 102532439 in words is "one hundred two million, five hundred thirty-two thousand, four hundred thirty-nine".