1345423405 has 16 divisors (see below), whose sum is σ = 1707245568. Its totient is φ = 1016208000.

The previous prime is 1345423379. The next prime is 1345423411. The reversal of 1345423405 is 5043245431.

It is not a de Polignac number, because 1345423405 - 2²⁵ = 1311868973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 99501 + ... + 112210.

It is an arithmetic number, because the mean of its divisors is an integer number (106702848).

Almost surely, 2^1345423405 is an apocalyptic number.

It is an amenable number.

1345423405 is a deficient number, since it is larger than the sum of its proper divisors (361822163).

1345423405 is a wasteful number, since it uses less digits than its factorization.

1345423405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211788.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 1345423405 is about 36680.0136995612. The cubic root of 1345423405 is about 1103.9591230248.

Adding to 1345423405 its reverse (5043245431), we get a palindrome (6388668836).

The spelling of 1345423405 in words is "one billion, three hundred forty-five million, four hundred twenty-three thousand, four hundred five".