1605426 has 16 divisors (see below), whose sum is σ = 3279744. Its totient is φ = 523664.

The previous prime is 1605421. The next prime is 1605427. The reversal of 1605426 is 6245061.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1605396 and 1605405.

It is not an unprimeable number, because it can be changed into a prime (1605421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2565 + ... + 3128.

It is an arithmetic number, because the mean of its divisors is an integer number (204984).

2^1605426 is an apocalyptic number.

1605426 is an abundant number, since it is smaller than the sum of its proper divisors (1674318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1605426 is a wasteful number, since it uses less digits than its factorization.

1605426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5745.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1605426 is about 1267.0540635663. The cubic root of 1605426 is about 117.0927746876.

The spelling of 1605426 in words is "one million, six hundred five thousand, four hundred twenty-six".