1340421 has 8 divisors (see below), whose sum is σ = 1817760. Its totient is φ = 878352.

The previous prime is 1340419. The next prime is 1340441. The reversal of 1340421 is 1240431.

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

It is not a de Polignac number, because 1340421 - 2¹ = 1340419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1340421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3610 + ... + 3963.

It is an arithmetic number, because the mean of its divisors is an integer number (227220).

2^1340421 is an apocalyptic number.

It is an amenable number.

1340421 is a deficient number, since it is larger than the sum of its proper divisors (477339).

1340421 is an equidigital number, since it uses as much as digits as its factorization.

1340421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7635.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1340421 is about 1157.7655203019. The cubic root of 1340421 is about 110.2589217434.

Adding to 1340421 its reverse (1240431), we get a palindrome (2580852).

The spelling of 1340421 in words is "one million, three hundred forty thousand, four hundred twenty-one".