1340455 has 4 divisors (see below), whose sum is σ = 1608552. Its totient is φ = 1072360.

The previous prime is 1340447. The next prime is 1340459. The reversal of 1340455 is 5540431.

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

It is not a de Polignac number, because 1340455 - 2³ = 1340447 is a prime.

It is a Duffinian number.

1340455 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340459) 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, 134041 + ... + 134050.

It is an arithmetic number, because the mean of its divisors is an integer number (402138).

2^1340455 is an apocalyptic number.

1340455 is a deficient number, since it is larger than the sum of its proper divisors (268097).

1340455 is an equidigital number, since it uses as much as digits as its factorization.

1340455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268096.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1340455 is about 1157.7802036656. The cubic root of 1340455 is about 110.2598539808.

Adding to 1340455 its reverse (5540431), we get a palindrome (6880886).

The spelling of 1340455 in words is "one million, three hundred forty thousand, four hundred fifty-five".