10402209 has 8 divisors (see below), whose sum is σ = 15410720. Its totient is φ = 6934788.

The previous prime is 10402207. The next prime is 10402211. The reversal of 10402209 is 90220401.

It is an interprime number because it is at equal distance from previous prime (10402207) and next prime (10402211).

It is not a de Polignac number, because 10402209 - 2¹ = 10402207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10402191 and 10402200.

It is not an unprimeable number, because it can be changed into a prime (10402201) 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 7 ways as a sum of consecutive naturals, for example, 192607 + ... + 192660.

It is an arithmetic number, because the mean of its divisors is an integer number (1926340).

Almost surely, 2^10402209 is an apocalyptic number.

It is an amenable number.

10402209 is a deficient number, since it is larger than the sum of its proper divisors (5008511).

10402209 is an equidigital number, since it uses as much as digits as its factorization.

10402209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385276 (or 385270 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 10402209 is about 3225.2455720456. The cubic root of 10402209 is about 218.2940299212.

It can be divided in two parts, 1040 and 2209, that added together give a square (3249 = 57²).

The spelling of 10402209 in words is "ten million, four hundred two thousand, two hundred nine".