1345139523 has 144 divisors (see below), whose sum is σ = 2621717280. Its totient is φ = 656667648.

The previous prime is 1345139519. The next prime is 1345139533. The reversal of 1345139523 is 3259315431.

1345139523 is a `hidden beast` number, since 1 + 34 + 513 + 95 + 23 = 666.

It is not a de Polignac number, because 1345139523 - 2² = 1345139519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1345139533) by changing a digit.

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 143 ways as a sum of consecutive naturals, for example, 5773015 + ... + 5773247.

It is an arithmetic number, because the mean of its divisors is an integer number (18206370).

Almost surely, 2^1345139523 is an apocalyptic number.

1345139523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1345139523 is a deficient number, since it is larger than the sum of its proper divisors (1276577757).

1345139523 is a wasteful number, since it uses less digits than its factorization.

1345139523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 328 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 1345139523 is about 36676.1437858453. The cubic root of 1345139523 is about 1103.8814730779.

The spelling of 1345139523 in words is "one billion, three hundred forty-five million, one hundred thirty-nine thousand, five hundred twenty-three".