102409505 has 8 divisors (see below), whose sum is σ = 134063424. Its totient is φ = 74479600.

The previous prime is 102409499. The next prime is 102409507. The reversal of 102409505 is 505904201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102409505 - 2⁶ = 102409441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102409507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930941 + ... + 931050.

It is an arithmetic number, because the mean of its divisors is an integer number (16757928).

Almost surely, 2^102409505 is an apocalyptic number.

It is an amenable number.

102409505 is a deficient number, since it is larger than the sum of its proper divisors (31653919).

102409505 is a wasteful number, since it uses less digits than its factorization.

102409505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862007.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 102409505 is about 10119.7581492840. The cubic root of 102409505 is about 467.8573130769.

The spelling of 102409505 in words is "one hundred two million, four hundred nine thousand, five hundred five".