1393705 has 4 divisors (see below), whose sum is σ = 1672452. Its totient is φ = 1114960.

The previous prime is 1393697. The next prime is 1393723. The reversal of 1393705 is 5073931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5073931 = 19 ⋅267049.

It can be written as a sum of positive squares in 2 ways, for example, as 732736 + 660969 = 856^2 + 813^2 .

It is not a de Polignac number, because 1393705 - 2³ = 1393697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139366 + ... + 139375.

It is an arithmetic number, because the mean of its divisors is an integer number (418113).

2^1393705 is an apocalyptic number.

It is an amenable number.

1393705 is a deficient number, since it is larger than the sum of its proper divisors (278747).

1393705 is an equidigital number, since it uses as much as digits as its factorization.

1393705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278746.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 1393705 is about 1180.5528365982. The cubic root of 1393705 is about 111.7009721088.

It can be divided in two parts, 139 and 3705, that added together give a square (3844 = 62²).

The spelling of 1393705 in words is "one million, three hundred ninety-three thousand, seven hundred five".