102545447 has 4 divisors (see below), whose sum is σ = 102566256. Its totient is φ = 102524640.

The previous prime is 102545423. The next prime is 102545449. The reversal of 102545447 is 744545201.

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

It is a cyclic number.

It is not a de Polignac number, because 102545447 - 2¹⁶ = 102479911 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 (102545449) 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, 1622 + ... + 14412.

It is an arithmetic number, because the mean of its divisors is an integer number (25641564).

Almost surely, 2^102545447 is an apocalyptic number.

102545447 is a deficient number, since it is larger than the sum of its proper divisors (20809).

102545447 is an equidigital number, since it uses as much as digits as its factorization.

102545447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20808.

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 102545447 is about 10126.4725842714. The cubic root of 102545447 is about 468.0642383271.

The spelling of 102545447 in words is "one hundred two million, five hundred forty-five thousand, four hundred forty-seven".