102424561 has 4 divisors (see below), whose sum is σ = 102814272. Its totient is φ = 102034852.

The previous prime is 102424501. The next prime is 102424591. The reversal of 102424561 is 165424201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102424561 - 2¹¹ = 102422513 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, 194461 + ... + 194986.

It is an arithmetic number, because the mean of its divisors is an integer number (25703568).

Almost surely, 2^102424561 is an apocalyptic number.

It is an amenable number.

102424561 is a deficient number, since it is larger than the sum of its proper divisors (389711).

102424561 is an equidigital number, since it uses as much as digits as its factorization.

102424561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389710.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 102424561 is about 10120.5020132403. The cubic root of 102424561 is about 467.8802397071.

Adding to 102424561 its reverse (165424201), we get a palindrome (267848762).

The spelling of 102424561 in words is "one hundred two million, four hundred twenty-four thousand, five hundred sixty-one".