1306699072 has 42 divisors (see below), whose sum is σ = 3016332042. Its totient is φ = 560012544.

The previous prime is 1306699049. The next prime is 1306699091. The reversal of 1306699072 is 2709966031.

It can be written as a sum of positive squares in only one way, i.e., 1163082816 + 143616256 = 34104^2 + 11984^2 .

It is a super-2 number, since 2×1306699072² = 3414924929531322368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 205203 + ... + 211474.

Almost surely, 2^1306699072 is an apocalyptic number.

It is an amenable number.

1306699072 is an abundant number, since it is smaller than the sum of its proper divisors (1709632970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1306699072 is an equidigital number, since it uses as much as digits as its factorization.

1306699072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416703 (or 416686 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 1306699072 is about 36148.2927950961. The cubic root of 1306699072 is about 1093.2643693694.

The spelling of 1306699072 in words is "one billion, three hundred six million, six hundred ninety-nine thousand, seventy-two".