1343981 has 4 divisors (see below), whose sum is σ = 1346652. Its totient is φ = 1341312.

The previous prime is 1343971. The next prime is 1343983. The reversal of 1343981 is 1893431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 188356 + 1155625 = 434^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1343981 - 2⁶ = 1343917 is a prime.

It is a super-2 number, since 2×1343981² = 3612569856722, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 1343981 parts by 1639 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343983) 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, 326 + ... + 1671.

It is an arithmetic number, because the mean of its divisors is an integer number (336663).

2^1343981 is an apocalyptic number.

It is an amenable number.

1343981 is a deficient number, since it is larger than the sum of its proper divisors (2671).

1343981 is an equidigital number, since it uses as much as digits as its factorization.

1343981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670.

The product of its digits is 2592, while the sum is 29.

The square root of 1343981 is about 1159.3019451377. The cubic root of 1343981 is about 110.3564470175.

The spelling of 1343981 in words is "one million, three hundred forty-three thousand, nine hundred eighty-one".