1381801 has 4 divisors (see below), whose sum is σ = 1391104. Its totient is φ = 1372500.

The previous prime is 1381769. The next prime is 1381819. The reversal of 1381801 is 1081831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1081831 = 163 ⋅6637.

It is a cyclic number.

It is not a de Polignac number, because 1381801 - 2⁵ = 1381769 is a prime.

It is the 1176-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381871) by changing a digit.

It is a nontrivial repunit in base 1175.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4425 + ... + 4726.

It is an arithmetic number, because the mean of its divisors is an integer number (347776).

2^1381801 is an apocalyptic number.

It is an amenable number.

1381801 is a deficient number, since it is larger than the sum of its proper divisors (9303).

1381801 is an equidigital number, since it uses as much as digits as its factorization.

1381801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9302.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 1381801 is about 1175.5003190131. The cubic root of 1381801 is about 111.3820399154.

The spelling of 1381801 in words is "one million, three hundred eighty-one thousand, eight hundred one".