10402109 has 4 divisors (see below), whose sum is σ = 10416540. Its totient is φ = 10387680.

The previous prime is 10402103. The next prime is 10402129. The reversal of 10402109 is 90120401.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2856100 + 7546009 = 1690^2 + 2747^2 .

It is a cyclic number.

It is not a de Polignac number, because 10402109 - 2¹² = 10398013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10402103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6074 + ... + 7595.

It is an arithmetic number, because the mean of its divisors is an integer number (2604135).

Almost surely, 2^10402109 is an apocalyptic number.

It is an amenable number.

10402109 is a deficient number, since it is larger than the sum of its proper divisors (14431).

10402109 is an equidigital number, since it uses as much as digits as its factorization.

10402109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14430.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 10402109 is about 3225.2300693129. The cubic root of 10402109 is about 218.2933304072.

The spelling of 10402109 in words is "ten million, four hundred two thousand, one hundred nine".