1381217 has 2 divisors, whose sum is σ = 1381218. Its totient is φ = 1381216.

The previous prime is 1381213. The next prime is 1381229. The reversal of 1381217 is 7121831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817216 + 564001 = 904^2 + 751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381217 - 2² = 1381213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1381192 and 1381201.

It is not a weakly prime, because it can be changed into another prime (1381213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690608 + 690609.

It is an arithmetic number, because the mean of its divisors is an integer number (690609).

2^1381217 is an apocalyptic number.

It is an amenable number.

1381217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381217 is an equidigital number, since it uses as much as digits as its factorization.

1381217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 23.

The square root of 1381217 is about 1175.2518878947. The cubic root of 1381217 is about 111.3663463200.

The spelling of 1381217 in words is "one million, three hundred eighty-one thousand, two hundred seventeen".