1393405 has 24 divisors (see below), whose sum is σ = 1936872. Its totient is φ = 958464.

The previous prime is 1393397. The next prime is 1393417. The reversal of 1393405 is 5043931.

It can be written as a sum of positive squares in 12 ways, for example, as 622521 + 770884 = 789^2 + 878^2 .

It is not a de Polignac number, because 1393405 - 2³ = 1393397 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 1393405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14317 + ... + 14413.

It is an arithmetic number, because the mean of its divisors is an integer number (80703).

2^1393405 is an apocalyptic number.

It is an amenable number.

1393405 is a deficient number, since it is larger than the sum of its proper divisors (543467).

1393405 is a wasteful number, since it uses less digits than its factorization.

1393405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1393405 is about 1180.4257706438. The cubic root of 1393405 is about 111.6929568554.

The spelling of 1393405 in words is "one million, three hundred ninety-three thousand, four hundred five".