102424505 has 4 divisors (see below), whose sum is σ = 122909412. Its totient is φ = 81939600.

The previous prime is 102424501. The next prime is 102424591. The reversal of 102424505 is 505424201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505424201 = 5743 ⋅88007.

It can be written as a sum of positive squares in 2 ways, for example, as 81667369 + 20757136 = 9037^2 + 4556^2 .

It is not a de Polignac number, because 102424505 - 2² = 102424501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102424501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10242446 + ... + 10242455.

It is an arithmetic number, because the mean of its divisors is an integer number (30727353).

Almost surely, 2^102424505 is an apocalyptic number.

It is an amenable number.

102424505 is a deficient number, since it is larger than the sum of its proper divisors (20484907).

102424505 is an equidigital number, since it uses as much as digits as its factorization.

102424505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20484906.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 102424505 is about 10120.4992465787. The cubic root of 102424505 is about 467.8801544368.

Adding to 102424505 its reverse (505424201), we get a palindrome (607848706).

The spelling of 102424505 in words is "one hundred two million, four hundred twenty-four thousand, five hundred five".