1341991 has 8 divisors (see below), whose sum is σ = 1566720. Its totient is φ = 1125528.

The previous prime is 1341983. The next prime is 1342001. The reversal of 1341991 is 1991431.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1341991 - 2³ = 1341983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1341911) 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 in 7 ways as a sum of consecutive naturals, for example, 1711 + ... + 2368.

It is an arithmetic number, because the mean of its divisors is an integer number (195840).

2^1341991 is an apocalyptic number.

1341991 is a deficient number, since it is larger than the sum of its proper divisors (224729).

1341991 is an equidigital number, since it uses as much as digits as its factorization.

1341991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4133.

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

The square root of 1341991 is about 1158.4433520893. The cubic root of 1341991 is about 110.3019527429.

It can be divided in two parts, 1341 and 991, that added together give a palindrome (2332).

The spelling of 1341991 in words is "one million, three hundred forty-one thousand, nine hundred ninety-one".