1340641 has 4 divisors (see below), whose sum is σ = 1386900. Its totient is φ = 1294384.

The previous prime is 1340639. The next prime is 1340653. The reversal of 1340641 is 1460431.

It is a happy number.

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 1147041 + 193600 = 1071^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340641 - 2¹ = 1340639 is a prime.

It is a Duffinian number.

1340641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1340681) 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, 23086 + ... + 23143.

It is an arithmetic number, because the mean of its divisors is an integer number (346725).

2^1340641 is an apocalyptic number.

It is an amenable number.

1340641 is a deficient number, since it is larger than the sum of its proper divisors (46259).

1340641 is an equidigital number, since it uses as much as digits as its factorization.

1340641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46258.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1340641 is about 1157.8605270066. The cubic root of 1340641 is about 110.2649535886.

The spelling of 1340641 in words is "one million, three hundred forty thousand, six hundred forty-one".