1306129672 has 8 divisors (see below), whose sum is σ = 2448993150. Its totient is φ = 653064832.

The previous prime is 1306129663. The next prime is 1306129697. The reversal of 1306129672 is 2769216031.

It can be written as a sum of positive squares in only one way, i.e., 1292690116 + 13439556 = 35954^2 + 3666^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81633097 + ... + 81633112.

Almost surely, 2^1306129672 is an apocalyptic number.

It is an amenable number.

1306129672 is a deficient number, since it is larger than the sum of its proper divisors (1142863478).

1306129672 is a wasteful number, since it uses less digits than its factorization.

1306129672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163266215 (or 163266211 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1306129672 is about 36140.4160463047. The cubic root of 1306129672 is about 1093.1055480088.

The spelling of 1306129672 in words is "one billion, three hundred six million, one hundred twenty-nine thousand, six hundred seventy-two".