1340591 has 12 divisors (see below), whose sum is σ = 1580040. Its totient is φ = 1134000.

The previous prime is 1340587. The next prime is 1340617. The reversal of 1340591 is 1950431.

It is a happy number.

It is not a de Polignac number, because 1340591 - 2² = 1340587 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5216 + ... + 5466.

It is an arithmetic number, because the mean of its divisors is an integer number (131670).

2^1340591 is an apocalyptic number.

1340591 is a deficient number, since it is larger than the sum of its proper divisors (239449).

1340591 is a wasteful number, since it uses less digits than its factorization.

1340591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1340591 is about 1157.8389352583. The cubic root of 1340591 is about 110.2635827727.

It can be divided in two parts, 13 and 40591, that added together give a palindrome (40604).

The spelling of 1340591 in words is "one million, three hundred forty thousand, five hundred ninety-one".