102505055 has 4 divisors (see below), whose sum is σ = 123006072. Its totient is φ = 82004040.

The previous prime is 102505049. The next prime is 102505061. The reversal of 102505055 is 550505201.

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

It is an interprime number because it is at equal distance from previous prime (102505049) and next prime (102505061).

It is not a de Polignac number, because 102505055 - 2¹⁴ = 102488671 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 102505055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10250501 + ... + 10250510.

It is an arithmetic number, because the mean of its divisors is an integer number (30751518).

Almost surely, 2^102505055 is an apocalyptic number.

102505055 is a deficient number, since it is larger than the sum of its proper divisors (20501017).

102505055 is an equidigital number, since it uses as much as digits as its factorization.

102505055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20501016.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 102505055 is about 10124.4780112359. The cubic root of 102505055 is about 468.0027744131.

The spelling of 102505055 in words is "one hundred two million, five hundred five thousand, fifty-five".