1306020136 has 8 divisors (see below), whose sum is σ = 2448787770. Its totient is φ = 653010064.

The previous prime is 1306020127. The next prime is 1306020137. The reversal of 1306020136 is 6310206031.

It can be written as a sum of positive squares in only one way, i.e., 1262380900 + 43639236 = 35530^2 + 6606^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1306020137) by changing a digit.

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 as a sum of consecutive naturals, namely, 81626251 + ... + 81626266.

Almost surely, 2^1306020136 is an apocalyptic number.

It is an amenable number.

1306020136 is a deficient number, since it is larger than the sum of its proper divisors (1142767634).

1306020136 is a wasteful number, since it uses less digits than its factorization.

1306020136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163252523 (or 163252519 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1306020136 is about 36138.9005920213. The cubic root of 1306020136 is about 1093.0749901045.

Adding to 1306020136 its reverse (6310206031), we get a palindrome (7616226167).

The spelling of 1306020136 in words is "one billion, three hundred six million, twenty thousand, one hundred thirty-six".