1281395 has 4 divisors (see below), whose sum is σ = 1537680. Its totient is φ = 1025112.

The previous prime is 1281389. The next prime is 1281407. The reversal of 1281395 is 5931821.

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

It is a cyclic number.

It is not a de Polignac number, because 1281395 - 2⁶ = 1281331 is a prime.

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, 128135 + ... + 128144.

It is an arithmetic number, because the mean of its divisors is an integer number (384420).

2^1281395 is an apocalyptic number.

1281395 is a deficient number, since it is larger than the sum of its proper divisors (256285).

1281395 is an equidigital number, since it uses as much as digits as its factorization.

1281395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256284.

The product of its digits is 2160, while the sum is 29.

The square root of 1281395 is about 1131.9871907402. The cubic root of 1281395 is about 108.6161342242.

Adding to 1281395 its sum of digits (29), we get a square (1281424 = 1132²).

The spelling of 1281395 in words is "one million, two hundred eighty-one thousand, three hundred ninety-five".