1381901 has 2 divisors, whose sum is σ = 1381902. Its totient is φ = 1381900.

The previous prime is 1381883. The next prime is 1381907. The reversal of 1381901 is 1091831.

1381901 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990025 + 391876 = 995^2 + 626^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381901 - 2⁶ = 1381837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690950 + 690951.

It is an arithmetic number, because the mean of its divisors is an integer number (690951).

2^1381901 is an apocalyptic number.

It is an amenable number.

1381901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381901 is an equidigital number, since it uses as much as digits as its factorization.

1381901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1381901 is about 1175.5428533235. The cubic root of 1381901 is about 111.3847267314.

The spelling of 1381901 in words is "one million, three hundred eighty-one thousand, nine hundred one".