1340420120 has 96 divisors (see below), whose sum is σ = 3306517200. Its totient is φ = 488756736.

The previous prime is 1340420117. The next prime is 1340420153. The reversal of 1340420120 is 210240431.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 559886 + ... + 562274.

Almost surely, 2^1340420120 is an apocalyptic number.

1340420120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1340420120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1653258600).

1340420120 is an abundant number, since it is smaller than the sum of its proper divisors (1966097080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1340420120 is a wasteful number, since it uses less digits than its factorization.

1340420120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509 (or 2492 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1340420120 is about 36611.7483876419. The cubic root of 1340420120 is about 1102.5889761474.

Adding to 1340420120 its reverse (210240431), we get a palindrome (1550660551).

The spelling of 1340420120 in words is "one billion, three hundred forty million, four hundred twenty thousand, one hundred twenty".