1399465 has 8 divisors (see below), whose sum is σ = 1711368. Its totient is φ = 1098240.

The previous prime is 1399441. The next prime is 1399469. The reversal of 1399465 is 5649931.

1399465 = 836² + 837².

It can be written as a sum of positive squares in 4 ways, for example, as 72361 + 1327104 = 269^2 + 1152^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1399465 is a prime.

It is a Duffinian number.

1399465 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1399469) by changing a digit.

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, 2376 + ... + 2905.

It is an arithmetic number, because the mean of its divisors is an integer number (213921).

2^1399465 is an apocalyptic number.

1399465 is the 837-th centered square number.

It is an amenable number.

1399465 is a deficient number, since it is larger than the sum of its proper divisors (311903).

1399465 is an equidigital number, since it uses as much as digits as its factorization.

1399465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5339.

The product of its digits is 29160, while the sum is 37.

The square root of 1399465 is about 1182.9898562541. The cubic root of 1399465 is about 111.8546424263.

It can be divided in two parts, 139 and 9465, that added together give a square (9604 = 98²).

The spelling of 1399465 in words is "one million, three hundred ninety-nine thousand, four hundred sixty-five".