1340331 has 16 divisors (see below), whose sum is σ = 1941408. Its totient is φ = 819200.

The previous prime is 1340329. The next prime is 1340333. The reversal of 1340331 is 1330431.

It is an interprime number because it is at equal distance from previous prime (1340329) and next prime (1340333).

It is a 15-Lehmer number, since φ(1340331) divides (1340331-1)¹⁵.

It is a cyclic number.

It is not a de Polignac number, because 1340331 - 2¹ = 1340329 is a prime.

It is a super-2 number, since 2×1340331² = 3592974379122, which contains 22 as substring.

1340331 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1771 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (121338).

2^1340331 is an apocalyptic number.

1340331 is a deficient number, since it is larger than the sum of its proper divisors (601077).

1340331 is a wasteful number, since it uses less digits than its factorization.

1340331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1340331 is about 1157.7266516756. The cubic root of 1340331 is about 110.2564539802.

Adding to 1340331 its reverse (1330431), we get a palindrome (2670762).

The spelling of 1340331 in words is "one million, three hundred forty thousand, three hundred thirty-one".