1282381 has 2 divisors, whose sum is σ = 1282382. Its totient is φ = 1282380.

The previous prime is 1282363. The next prime is 1282387. The reversal of 1282381 is 1832821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 885481 + 396900 = 941^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 1282381 - 2⁵ = 1282349 is a prime.

It is a super-2 number, since 2×1282381² = 3289002058322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1282387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641190 + 641191.

It is an arithmetic number, because the mean of its divisors is an integer number (641191).

2^1282381 is an apocalyptic number.

It is an amenable number.

1282381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1282381 is an equidigital number, since it uses as much as digits as its factorization.

1282381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 25.

The square root of 1282381 is about 1132.4226242883. The cubic root of 1282381 is about 108.6439861749.

The spelling of 1282381 in words is "one million, two hundred eighty-two thousand, three hundred eighty-one".