1386281 has 4 divisors (see below), whose sum is σ = 1492932. Its totient is φ = 1279632.

The previous prime is 1386271. The next prime is 1386283. The reversal of 1386281 is 1826831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1826831 = 19 ⋅96149.

It can be written as a sum of positive squares in 2 ways, for example, as 883600 + 502681 = 940^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 1386281 - 2¹⁴ = 1369897 is a prime.

It is a super-2 number, since 2×1386281² = 3843550021922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1386283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53306 + ... + 53331.

It is an arithmetic number, because the mean of its divisors is an integer number (373233).

2^1386281 is an apocalyptic number.

It is an amenable number.

1386281 is a deficient number, since it is larger than the sum of its proper divisors (106651).

1386281 is a wasteful number, since it uses less digits than its factorization.

1386281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106650.

The product of its digits is 2304, while the sum is 29.

The square root of 1386281 is about 1177.4043485566. The cubic root of 1386281 is about 111.5022823237.

The spelling of 1386281 in words is "one million, three hundred eighty-six thousand, two hundred eighty-one".