102505487 has 4 divisors (see below), whose sum is σ = 117149136. Its totient is φ = 87861840.

The previous prime is 102505463. The next prime is 102505489. The reversal of 102505487 is 784505201.

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 102505487 - 2¹² = 102501391 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102505489) 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, 7321814 + ... + 7321827.

It is an arithmetic number, because the mean of its divisors is an integer number (29287284).

Almost surely, 2^102505487 is an apocalyptic number.

102505487 is a deficient number, since it is larger than the sum of its proper divisors (14643649).

102505487 is an equidigital number, since it uses as much as digits as its factorization.

102505487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14643648.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 102505487 is about 10124.4993456467. The cubic root of 102505487 is about 468.0034318666.

The spelling of 102505487 in words is "one hundred two million, five hundred five thousand, four hundred eighty-seven".