1369505 has 4 divisors (see below), whose sum is σ = 1643412. Its totient is φ = 1095600.

The previous prime is 1369499. The next prime is 1369517. The reversal of 1369505 is 5059631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5059631 = 571 ⋅8861.

It can be written as a sum of positive squares in 2 ways, for example, as 185761 + 1183744 = 431^2 + 1088^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1369505 is a prime.

It is a Duffinian number.

It is a congruent 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, 136946 + ... + 136955.

It is an arithmetic number, because the mean of its divisors is an integer number (410853).

2^1369505 is an apocalyptic number.

It is an amenable number.

1369505 is a deficient number, since it is larger than the sum of its proper divisors (273907).

1369505 is an equidigital number, since it uses as much as digits as its factorization.

1369505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273906.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 1369505 is about 1170.2585184480. The cubic root of 1369505 is about 111.0506762086.

The spelling of 1369505 in words is "one million, three hundred sixty-nine thousand, five hundred five".