1381001 has 4 divisors (see below), whose sum is σ = 1410432.
Its totient is φ = 1351572.
The previous prime is 1380997. The next prime is 1381027. The reversal of 1381001 is 1001831.
Adding to 1381001 its reverse (1001831), we get a palindrome (2382832).
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.
It is a cyclic number.
It is not a de Polignac number, because 1381001 - 22 = 1380997 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (1381901) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14645 + ... + 14738.
It is an arithmetic number, because the mean of its divisors is an integer number (352608).
21381001 is an apocalyptic number.
It is an amenable number.
1381001 is a deficient number, since it is larger than the sum of its proper divisors (29431).
1381001 is an equidigital number, since it uses as much as digits as its factorization.
1381001 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 29430.
The product of its (nonzero) digits is 24, while the sum is 14.
The square root of 1381001 is about 1175.1599891079.
The cubic root of 1381001 is about 111.3605407189.
The spelling of 1381001 in words is "one million, three hundred eighty-one thousand, one".