281072137 has 2 divisors, whose sum is σ = 281072138. Its totient is φ = 281072136.

The previous prime is 281072117. The next prime is 281072191. The reversal of 281072137 is 731270182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207043321 + 74028816 = 14389^2 + 8604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281072137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 281072099 and 281072108.

It is not a weakly prime, because it can be changed into another prime (281072107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140536068 + 140536069.

It is an arithmetic number, because the mean of its divisors is an integer number (140536069).

Almost surely, 2^281072137 is an apocalyptic number.

It is an amenable number.

281072137 is a deficient number, since it is larger than the sum of its proper divisors (1).

281072137 is an equidigital number, since it uses as much as digits as its factorization.

281072137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 281072137 is about 16765.2061424845. The cubic root of 281072137 is about 655.0472059679.

It can be divided in two parts, 2810 and 72137, that added together give a palindrome (74947).

The spelling of 281072137 in words is "two hundred eighty-one million, seventy-two thousand, one hundred thirty-seven".