1391941 has 2 divisors, whose sum is σ = 1391942. Its totient is φ = 1391940.

The previous prime is 1391933. The next prime is 1391969. The reversal of 1391941 is 1491931.

It is a happy number.

It is an a-pointer prime, because the next prime (1391969) can be obtained adding 1391941 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 894916 + 497025 = 946^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391941 - 2³ = 1391933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391981) 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, 695970 + 695971.

It is an arithmetic number, because the mean of its divisors is an integer number (695971).

2^1391941 is an apocalyptic number.

It is an amenable number.

1391941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391941 is an equidigital number, since it uses as much as digits as its factorization.

1391941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 28.

The square root of 1391941 is about 1179.8054924436. The cubic root of 1391941 is about 111.6538259040.

It can be divided in two parts, 1391 and 941, that added together give a palindrome (2332).

The spelling of 1391941 in words is "one million, three hundred ninety-one thousand, nine hundred forty-one".