1345247523 has 12 divisors (see below), whose sum is σ = 1950309088. Its totient is φ = 893520720.

The previous prime is 1345247521. The next prime is 1345247569. The reversal of 1345247523 is 3257425431.

1345247523 is a `hidden beast` number, since 134 + 52 + 475 + 2 + 3 = 666.

It is not a de Polignac number, because 1345247523 - 2¹ = 1345247521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345247521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 273340 + ... + 278217.

Almost surely, 2^1345247523 is an apocalyptic number.

1345247523 is a deficient number, since it is larger than the sum of its proper divisors (605061565).

1345247523 is a wasteful number, since it uses less digits than its factorization.

1345247523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551834 (or 551831 counting only the distinct ones).

The product of its digits is 100800, while the sum is 36.

The square root of 1345247523 is about 36677.6161030130. The cubic root of 1345247523 is about 1103.9110154925.

The spelling of 1345247523 in words is "one billion, three hundred forty-five million, two hundred forty-seven thousand, five hundred twenty-three".