1040409 has 6 divisors (see below), whose sum is σ = 1502826. Its totient is φ = 693600.

The previous prime is 1040407. The next prime is 1040411. The reversal of 1040409 is 9040401.

1040409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1040407) and next prime (1040411).

It can be written as a sum of positive squares in only one way, i.e., 1040400 + 9 = 1020^2 + 3^2 .

It is not a de Polignac number, because 1040409 - 2¹ = 1040407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1040391 and 1040400.

It is not an unprimeable number, because it can be changed into a prime (1040407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57792 + ... + 57809.

It is an arithmetic number, because the mean of its divisors is an integer number (250471).

2^1040409 is an apocalyptic number.

It is an amenable number.

1040409 is a deficient number, since it is larger than the sum of its proper divisors (462417).

1040409 is a wasteful number, since it uses less digits than its factorization.

1040409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115607 (or 115604 counting only the distinct ones).

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

The square root of 1040409 is about 1020.0044117552. The cubic root of 1040409 is about 101.3292201220.

The spelling of 1040409 in words is "one million, forty thousand, four hundred nine".