1340434461 has 4 divisors (see below), whose sum is σ = 1787245952. Its totient is φ = 893622972.

The previous prime is 1340434453. The next prime is 1340434463. The reversal of 1340434461 is 1644340431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1644340431 = 3 ⋅548113477.

It is not a de Polignac number, because 1340434461 - 2³ = 1340434453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340434463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223405741 + ... + 223405746.

It is an arithmetic number, because the mean of its divisors is an integer number (446811488).

Almost surely, 2^1340434461 is an apocalyptic number.

It is an amenable number.

1340434461 is a deficient number, since it is larger than the sum of its proper divisors (446811491).

1340434461 is an equidigital number, since it uses as much as digits as its factorization.

1340434461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446811490.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 1340434461 is about 36611.9442395511. The cubic root of 1340434461 is about 1102.5929082907.

Adding to 1340434461 its reverse (1644340431), we get a palindrome (2984774892).

The spelling of 1340434461 in words is "one billion, three hundred forty million, four hundred thirty-four thousand, four hundred sixty-one".