10420009 has 2 divisors, whose sum is σ = 10420010. Its totient is φ = 10420008.

The previous prime is 10420001. The next prime is 10420079. The reversal of 10420009 is 90002401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10419984 + 25 = 3228^2 + 5^2 .

It is an emirp because it is prime and its reverse (90002401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10420009 - 2³ = 10420001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10419974 and 10420001.

It is not a weakly prime, because it can be changed into another prime (10420001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210004 + 5210005.

It is an arithmetic number, because the mean of its divisors is an integer number (5210005).

Almost surely, 2^10420009 is an apocalyptic number.

It is an amenable number.

10420009 is a deficient number, since it is larger than the sum of its proper divisors (1).

10420009 is an equidigital number, since it uses as much as digits as its factorization.

10420009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 10420009 is about 3228.0038723645. The cubic root of 10420009 is about 218.4184720631.

The spelling of 10420009 in words is "ten million, four hundred twenty thousand, nine".