1345100420 has 12 divisors (see below), whose sum is σ = 2824710924. Its totient is φ = 538040160.

The previous prime is 1345100411. The next prime is 1345100443. The reversal of 1345100420 is 240015431.

It can be written as a sum of positive squares in 2 ways, for example, as 647295364 + 697805056 = 25442^2 + 26416^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 67255021 = 1345100420 / (1 + 3 + 4 + 5 + 1 + 0 + 0 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1345100392 and 1345100401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33627491 + ... + 33627530.

It is an arithmetic number, because the mean of its divisors is an integer number (235392577).

Almost surely, 2^1345100420 is an apocalyptic number.

1345100420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1345100420 is an abundant number, since it is smaller than the sum of its proper divisors (1479610504).

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

1345100420 is a wasteful number, since it uses less digits than its factorization.

1345100420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67255030 (or 67255028 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1345100420 is about 36675.6106970286. The cubic root of 1345100420 is about 1103.8707764191.

Adding to 1345100420 its reverse (240015431), we get a palindrome (1585115851).

The spelling of 1345100420 in words is "one billion, three hundred forty-five million, one hundred thousand, four hundred twenty".