1345123605 has 32 divisors (see below), whose sum is σ = 2566600704. Its totient is φ = 588177216.

The previous prime is 1345123583. The next prime is 1345123607. The reversal of 1345123605 is 5063215431.

It is not a de Polignac number, because 1345123605 - 2⁸ = 1345123349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345123607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276079 + ... + 280908.

It is an arithmetic number, because the mean of its divisors is an integer number (80206272).

Almost surely, 2^1345123605 is an apocalyptic number.

1345123605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1345123605 is a deficient number, since it is larger than the sum of its proper divisors (1221477099).

1345123605 is a wasteful number, since it uses less digits than its factorization.

1345123605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557025.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1345123605 is about 36675.9267776562. The cubic root of 1345123605 is about 1103.8771187205.

The spelling of 1345123605 in words is "one billion, three hundred forty-five million, one hundred twenty-three thousand, six hundred five".