1387465 has 4 divisors (see below), whose sum is σ = 1664964. Its totient is φ = 1109968.

The previous prime is 1387433. The next prime is 1387499. The reversal of 1387465 is 5647831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 425104 + 962361 = 652^2 + 981^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387465 - 2⁵ = 1387433 is a prime.

It is a Duffinian number.

1387465 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387465.

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 3 ways as a sum of consecutive naturals, for example, 138742 + ... + 138751.

It is an arithmetic number, because the mean of its divisors is an integer number (416241).

2^1387465 is an apocalyptic number.

It is an amenable number.

1387465 is a deficient number, since it is larger than the sum of its proper divisors (277499).

1387465 is an equidigital number, since it uses as much as digits as its factorization.

1387465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277498.

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

The square root of 1387465 is about 1177.9070421727. The cubic root of 1387465 is about 111.5340173844.

It can be divided in two parts, 13 and 87465, that added together give a palindrome (87478).

The spelling of 1387465 in words is "one million, three hundred eighty-seven thousand, four hundred sixty-five".