1378141 has 2 divisors, whose sum is σ = 1378142. Its totient is φ = 1378140.

The previous prime is 1378129. The next prime is 1378147. The reversal of 1378141 is 1418731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1071225 + 306916 = 1035^2 + 554^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378141 - 2¹¹ = 1376093 is a prime.

1378141 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689070 + 689071.

It is an arithmetic number, because the mean of its divisors is an integer number (689071).

2^1378141 is an apocalyptic number.

It is an amenable number.

1378141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378141 is an equidigital number, since it uses as much as digits as its factorization.

1378141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 1378141 is about 1173.9425028510. The cubic root of 1378141 is about 111.2836131230.

The spelling of 1378141 in words is "one million, three hundred seventy-eight thousand, one hundred forty-one".