1345420340 has 24 divisors (see below), whose sum is σ = 3082236192. Its totient is φ = 489243680.

The previous prime is 1345420283. The next prime is 1345420357. The reversal of 1345420340 is 430245431.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3057554 + ... + 3057993.

It is an arithmetic number, because the mean of its divisors is an integer number (128426508).

Almost surely, 2^1345420340 is an apocalyptic number.

1345420340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1345420340 is an abundant number, since it is smaller than the sum of its proper divisors (1736815852).

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

1345420340 is a wasteful number, since it uses less digits than its factorization.

1345420340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115567 (or 6115565 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 1345420340 is about 36679.9719192913. The cubic root of 1345420340 is about 1103.9582847169.

Adding to 1345420340 its reverse (430245431), we get a palindrome (1775665771).

The spelling of 1345420340 in words is "one billion, three hundred forty-five million, four hundred twenty thousand, three hundred forty".