1423009 has 12 divisors (see below), whose sum is σ = 1676484. Its totient is φ = 1204224.

The previous prime is 1423003. The next prime is 1423039. The reversal of 1423009 is 9003241.

It can be written as a sum of positive squares in 2 ways, for example, as 717409 + 705600 = 847^2 + 840^2 .

It is not a de Polignac number, because 1423009 - 2⁵ = 1422977 is a prime.

It is a super-2 number, since 2×1423009² = 4049909228162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423003) 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 11 ways as a sum of consecutive naturals, for example, 5409 + ... + 5665.

It is an arithmetic number, because the mean of its divisors is an integer number (139707).

2^1423009 is an apocalyptic number.

It is an amenable number.

1423009 is a deficient number, since it is larger than the sum of its proper divisors (253475).

1423009 is a wasteful number, since it uses less digits than its factorization.

1423009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1423009 is about 1192.8994090031. The cubic root of 1423009 is about 112.4784221990.

The spelling of 1423009 in words is "one million, four hundred twenty-three thousand, nine".