1306240137 has 12 divisors (see below), whose sum is σ = 1887381184. Its totient is φ = 870554520.

The previous prime is 1306240097. The next prime is 1306240163. The reversal of 1306240137 is 7310426031.

1306240137 is a `hidden beast` number, since 1 + 3 + 0 + 624 + 0 + 1 + 37 = 666.

It is not a de Polignac number, because 1306240137 - 2¹⁵ = 1306207369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1306240137.

It is not an unprimeable number, because it can be changed into a prime (1306248137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10212 + ... + 52122.

Almost surely, 2^1306240137 is an apocalyptic number.

It is an amenable number.

1306240137 is a deficient number, since it is larger than the sum of its proper divisors (581141047).

1306240137 is a wasteful number, since it uses less digits than its factorization.

1306240137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45380 (or 45377 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1306240137 is about 36141.9442891497. The cubic root of 1306240137 is about 1093.1363633515.

Adding to 1306240137 its reverse (7310426031), we get a palindrome (8616666168).

The spelling of 1306240137 in words is "one billion, three hundred six million, two hundred forty thousand, one hundred thirty-seven".