1340444101 has 4 divisors (see below), whose sum is σ = 1419293772. Its totient is φ = 1261594432.

The previous prime is 1340444099. The next prime is 1340444141. The reversal of 1340444101 is 1014440431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1014440431 = 61 ⋅16630171.

It can be written as a sum of positive squares in 2 ways, for example, as 618715876 + 721728225 = 24874^2 + 26865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340444101 - 2¹ = 1340444099 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 (1340444141) 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, 39424810 + ... + 39424843.

It is an arithmetic number, because the mean of its divisors is an integer number (354823443).

Almost surely, 2^1340444101 is an apocalyptic number.

It is an amenable number.

1340444101 is a deficient number, since it is larger than the sum of its proper divisors (78849671).

1340444101 is an equidigital number, since it uses as much as digits as its factorization.

1340444101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78849670.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1340444101 is about 36612.0758903398. The cubic root of 1340444101 is about 1102.5955514561.

Adding to 1340444101 its reverse (1014440431), we get a palindrome (2354884532).

The spelling of 1340444101 in words is "one billion, three hundred forty million, four hundred forty-four thousand, one hundred one".