1305134123497 has 4 divisors (see below), whose sum is σ = 1305185513940. Its totient is φ = 1305082733056.

The previous prime is 1305134123459. The next prime is 1305134123569. The reversal of 1305134123497 is 7943214315031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 197074732761 + 1108059390736 = 443931^2 + 1052644^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305134123497 - 2³¹ = 1302986639849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305134123197) 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, 25657108 + ... + 25707925.

It is an arithmetic number, because the mean of its divisors is an integer number (326296378485).

Almost surely, 2^{1305134123497} is an apocalyptic number.

It is an amenable number.

1305134123497 is a deficient number, since it is larger than the sum of its proper divisors (51390443).

1305134123497 is an equidigital number, since it uses as much as digits as its factorization.

1305134123497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51390442.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 1305134123497 in words is "one trillion, three hundred five billion, one hundred thirty-four million, one hundred twenty-three thousand, four hundred ninety-seven".