1078405 has 4 divisors (see below), whose sum is σ = 1294092. Its totient is φ = 862720.

The previous prime is 1078403. The next prime is 1078409. The reversal of 1078405 is 5048701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5048701 = 7 ⋅721243.

It can be written as a sum of positive squares in 2 ways, for example, as 357604 + 720801 = 598^2 + 849^2 .

It is not a de Polignac number, because 1078405 - 2¹ = 1078403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1078405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078403) 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, 107836 + ... + 107845.

It is an arithmetic number, because the mean of its divisors is an integer number (323523).

2^1078405 is an apocalyptic number.

It is an amenable number.

1078405 is a deficient number, since it is larger than the sum of its proper divisors (215687).

1078405 is an equidigital number, since it uses as much as digits as its factorization.

1078405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215686.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1078405 is about 1038.4628062670. The cubic root of 1078405 is about 102.5480242932.

The spelling of 1078405 in words is "one million, seventy-eight thousand, four hundred five".