102045247 has 4 divisors (see below), whose sum is σ = 103482576. Its totient is φ = 100607920.

The previous prime is 102045241. The next prime is 102045259. The reversal of 102045247 is 742540201.

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 102045247 - 2³ = 102045239 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 (102045241) 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, 718558 + ... + 718699.

It is an arithmetic number, because the mean of its divisors is an integer number (25870644).

Almost surely, 2^102045247 is an apocalyptic number.

102045247 is a deficient number, since it is larger than the sum of its proper divisors (1437329).

102045247 is an equidigital number, since it uses as much as digits as its factorization.

102045247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437328.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 102045247 is about 10101.7447502894. The cubic root of 102045247 is about 467.3019504844.

Adding to 102045247 its reverse (742540201), we get a palindrome (844585448).

It can be divided in two parts, 10204 and 5247, that added together give a palindrome (15451).

The spelling of 102045247 in words is "one hundred two million, forty-five thousand, two hundred forty-seven".