1387265 has 12 divisors (see below), whose sum is σ = 1830612. Its totient is φ = 1008480.

The previous prime is 1387261. The next prime is 1387271. The reversal of 1387265 is 5627831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 450241 + 937024 = 671^2 + 968^2 .

It is not a de Polignac number, because 1387265 - 2² = 1387261 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 542 + ... + 1751.

It is an arithmetic number, because the mean of its divisors is an integer number (152551).

2^1387265 is an apocalyptic number.

It is an amenable number.

1387265 is a deficient number, since it is larger than the sum of its proper divisors (443347).

1387265 is a wasteful number, since it uses less digits than its factorization.

1387265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320 (or 2309 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 1387265 is about 1177.8221427703. The cubic root of 1387265 is about 111.5286579999.

It can be divided in two parts, 13 and 87265, that added together give a palindrome (87278).

The spelling of 1387265 in words is "one million, three hundred eighty-seven thousand, two hundred sixty-five".