1306523121 has 16 divisors (see below), whose sum is σ = 1777633920. Its totient is φ = 853372800.

The previous prime is 1306523107. The next prime is 1306523123. The reversal of 1306523121 is 1213256031.

It is not a de Polignac number, because 1306523121 - 2¹³ = 1306514929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1306523091 and 1306523100.

It is not an unprimeable number, because it can be changed into a prime (1306523123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13315 + ... + 52823.

It is an arithmetic number, because the mean of its divisors is an integer number (111102120).

Almost surely, 2^1306523121 is an apocalyptic number.

It is an amenable number.

1306523121 is a deficient number, since it is larger than the sum of its proper divisors (471110799).

1306523121 is a wasteful number, since it uses less digits than its factorization.

1306523121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39736.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1306523121 is about 36145.8589744386. The cubic root of 1306523121 is about 1093.2152967105.

Adding to 1306523121 its reverse (1213256031), we get a palindrome (2519779152).

The spelling of 1306523121 in words is "one billion, three hundred six million, five hundred twenty-three thousand, one hundred twenty-one".