102455545 has 4 divisors (see below), whose sum is σ = 122946660. Its totient is φ = 81964432.

The previous prime is 102455537. The next prime is 102455557. The reversal of 102455545 is 545554201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29387241 + 73068304 = 5421^2 + 8548^2 .

It is a cyclic number.

It is not a de Polignac number, because 102455545 - 2³ = 102455537 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 10245550 + ... + 10245559.

It is an arithmetic number, because the mean of its divisors is an integer number (30736665).

Almost surely, 2^102455545 is an apocalyptic number.

It is an amenable number.

102455545 is a deficient number, since it is larger than the sum of its proper divisors (20491115).

102455545 is an equidigital number, since it uses as much as digits as its factorization.

102455545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20491114.

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 102455545 is about 10122.0326515972. The cubic root of 102455545 is about 467.9274137431.

The spelling of 102455545 in words is "one hundred two million, four hundred fifty-five thousand, five hundred forty-five".