1378061 has 2 divisors, whose sum is σ = 1378062. Its totient is φ = 1378060.

The previous prime is 1378057. The next prime is 1378067. The reversal of 1378061 is 1608731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1012036 + 366025 = 1006^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378061 - 2² = 1378057 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1378061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689030 + 689031.

It is an arithmetic number, because the mean of its divisors is an integer number (689031).

2^1378061 is an apocalyptic number.

It is an amenable number.

1378061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378061 is an equidigital number, since it uses as much as digits as its factorization.

1378061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1378061 is about 1173.9084291375. The cubic root of 1378061 is about 111.2814597726.

The spelling of 1378061 in words is "one million, three hundred seventy-eight thousand, sixty-one".