1340420422 has 16 divisors (see below), whose sum is σ = 2193998400. Its totient is φ = 609120040.

The previous prime is 1340420387. The next prime is 1340420429. The reversal of 1340420422 is 2240240431.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1340420393 and 1340420402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340420429) 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, 125529 + ... + 135787.

It is an arithmetic number, because the mean of its divisors is an integer number (137124900).

Almost surely, 2^1340420422 is an apocalyptic number.

1340420422 is a deficient number, since it is larger than the sum of its proper divisors (853577978).

1340420422 is a wasteful number, since it uses less digits than its factorization.

1340420422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16211.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1340420422 is about 36611.7525120008. The cubic root of 1340420422 is about 1102.5890589527.

Adding to 1340420422 its reverse (2240240431), we get a palindrome (3580660853).

Subtracting 1340420422 from its reverse (2240240431), we obtain a square (899820009 = 29997²).

The spelling of 1340420422 in words is "one billion, three hundred forty million, four hundred twenty thousand, four hundred twenty-two".