1345023523 has 4 divisors (see below), whose sum is σ = 1345469440. Its totient is φ = 1344577608.

The previous prime is 1345023517. The next prime is 1345023541. The reversal of 1345023523 is 3253205431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3253205431 = 7 ⋅464743633.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345023523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1345023491 and 1345023500.

It is not an unprimeable number, because it can be changed into a prime (1345023583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218403 + ... + 224476.

It is an arithmetic number, because the mean of its divisors is an integer number (336367360).

Almost surely, 2^1345023523 is an apocalyptic number.

1345023523 is a deficient number, since it is larger than the sum of its proper divisors (445917).

1345023523 is an equidigital number, since it uses as much as digits as its factorization.

1345023523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445916.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 1345023523 is about 36674.5623423102. The cubic root of 1345023523 is about 1103.8497405748.

Adding to 1345023523 its reverse (3253205431), we get a palindrome (4598228954).

The spelling of 1345023523 in words is "one billion, three hundred forty-five million, twenty-three thousand, five hundred twenty-three".