102435561 has 12 divisors (see below), whose sum is σ = 148512000. Its totient is φ = 68036760.

The previous prime is 102435551. The next prime is 102435577. The reversal of 102435561 is 165534201.

102435561 is a `hidden beast` number, since 102 + 4 + 3 + 556 + 1 = 666.

It is not a de Polignac number, because 102435561 - 2⁶ = 102435497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102435551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18561 + ... + 23438.

It is an arithmetic number, because the mean of its divisors is an integer number (12376000).

Almost surely, 2^102435561 is an apocalyptic number.

It is an amenable number.

102435561 is a deficient number, since it is larger than the sum of its proper divisors (46076439).

102435561 is a wasteful number, since it uses less digits than its factorization.

102435561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42276 (or 42273 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 102435561 is about 10121.0454499523. The cubic root of 102435561 is about 467.8969886143.

Adding to 102435561 its reverse (165534201), we get a palindrome (267969762).

It can be divided in two parts, 1024 and 35561, that added together give a triangular number (36585 = T₂₇₀).

The spelling of 102435561 in words is "one hundred two million, four hundred thirty-five thousand, five hundred sixty-one".