102561019 has 8 divisors (see below), whose sum is σ = 113142960. Its totient is φ = 92188800.

The previous prime is 102561007. The next prime is 102561037. The reversal of 102561019 is 910165201.

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

It is not a de Polignac number, because 102561019 - 2¹⁹ = 102036731 is a prime.

It is a super-2 number, since 2×102561019² = 21037525236636722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102560984 and 102561002.

It is not an unprimeable number, because it can be changed into a prime (102561089) 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 7 ways as a sum of consecutive naturals, for example, 51402 + ... + 53359.

It is an arithmetic number, because the mean of its divisors is an integer number (14142870).

Almost surely, 2^102561019 is an apocalyptic number.

102561019 is a deficient number, since it is larger than the sum of its proper divisors (10581941).

102561019 is a wasteful number, since it uses less digits than its factorization.

102561019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104861.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 102561019 is about 10127.2414309130. The cubic root of 102561019 is about 468.0879297004.

The spelling of 102561019 in words is "one hundred two million, five hundred sixty-one thousand, nineteen".