1340110421 has 16 divisors (see below), whose sum is σ = 1467063024. Its totient is φ = 1216664064.

The previous prime is 1340110399. The next prime is 1340110517. The reversal of 1340110421 is 1240110431.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 108451396 + 1231659025 = 10414^2 + 35095^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340110421 - 2¹⁸ = 1339848277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340110421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340110021) 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 15 ways as a sum of consecutive naturals, for example, 374975 + ... + 378531.

It is an arithmetic number, because the mean of its divisors is an integer number (91691439).

Almost surely, 2^1340110421 is an apocalyptic number.

It is an amenable number.

1340110421 is a deficient number, since it is larger than the sum of its proper divisors (126952603).

1340110421 is a wasteful number, since it uses less digits than its factorization.

1340110421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1340110421 is about 36607.5186403012. The cubic root of 1340110421 is about 1102.5040532688.

Adding to 1340110421 its reverse (1240110431), we get a palindrome (2580220852).

The spelling of 1340110421 in words is "one billion, three hundred forty million, one hundred ten thousand, four hundred twenty-one".