1386745 has 8 divisors (see below), whose sum is σ = 1695816. Its totient is φ = 1088256.

The previous prime is 1386733. The next prime is 1386757. The reversal of 1386745 is 5476831.

It is an interprime number because it is at equal distance from previous prime (1386733) and next prime (1386757).

It can be written as a sum of positive squares in 4 ways, for example, as 619369 + 767376 = 787^2 + 876^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1386745 - 2⁷ = 1386617 is a prime.

It is a Duffinian number.

1386745 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1386745.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2352 + ... + 2881.

It is an arithmetic number, because the mean of its divisors is an integer number (211977).

2^1386745 is an apocalyptic number.

It is an amenable number.

1386745 is a deficient number, since it is larger than the sum of its proper divisors (309071).

1386745 is an equidigital number, since it uses as much as digits as its factorization.

1386745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5291.

The product of its digits is 20160, while the sum is 34.

The square root of 1386745 is about 1177.6013756785. The cubic root of 1386745 is about 111.5147211890.

The spelling of 1386745 in words is "one million, three hundred eighty-six thousand, seven hundred forty-five".