102099561 has 8 divisors (see below), whose sum is σ = 136189920. Its totient is φ = 68037792.

The previous prime is 102099541. The next prime is 102099563. The reversal of 102099561 is 165990201.

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

It is not a de Polignac number, because 102099561 - 2⁶ = 102099497 is a prime.

It is a super-3 number, since 3×102099561³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102099563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3421 + ... + 14693.

It is an arithmetic number, because the mean of its divisors is an integer number (17023740).

Almost surely, 2^102099561 is an apocalyptic number.

It is an amenable number.

102099561 is a deficient number, since it is larger than the sum of its proper divisors (34090359).

102099561 is a wasteful number, since it uses less digits than its factorization.

102099561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14295.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 102099561 is about 10104.4327401393. The cubic root of 102099561 is about 467.3848435707.

The spelling of 102099561 in words is "one hundred two million, ninety-nine thousand, five hundred sixty-one".