1268381 has 4 divisors (see below), whose sum is σ = 1323552. Its totient is φ = 1213212.

The previous prime is 1268369. The next prime is 1268413. The reversal of 1268381 is 1838621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1268381 - 2¹⁸ = 1006237 is a prime.

It is a super-2 number, since 2×1268381² = 3217580722322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268341) 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, 27551 + ... + 27596.

It is an arithmetic number, because the mean of its divisors is an integer number (330888).

2^1268381 is an apocalyptic number.

It is an amenable number.

1268381 is a deficient number, since it is larger than the sum of its proper divisors (55171).

1268381 is an equidigital number, since it uses as much as digits as its factorization.

1268381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55170.

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

The square root of 1268381 is about 1126.2242227905. The cubic root of 1268381 is about 108.2471762051.

The spelling of 1268381 in words is "one million, two hundred sixty-eight thousand, three hundred eighty-one".