102435409 has 6 divisors (see below), whose sum is σ = 104145990. Its totient is φ = 100752480.

The previous prime is 102435407. The next prime is 102435427. The reversal of 102435409 is 904534201.

It can be written as a sum of positive squares in 3 ways, for example, as 8248384 + 94187025 = 2872^2 + 9705^2 .

It is not a de Polignac number, because 102435409 - 2¹ = 102435407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102435407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10044 + ... + 17485.

It is an arithmetic number, because the mean of its divisors is an integer number (17357665).

Almost surely, 2^102435409 is an apocalyptic number.

It is an amenable number.

102435409 is a deficient number, since it is larger than the sum of its proper divisors (1710581).

102435409 is an frugal number, since it uses more digits than its factorization.

102435409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27651 (or 27590 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 102435409 is about 10121.0379408438. The cubic root of 102435409 is about 467.8967571830.

The spelling of 102435409 in words is "one hundred two million, four hundred thirty-five thousand, four hundred nine".