731278141 has 6 divisors (see below), whose sum is σ = 803801726. Its totient is φ = 664798200.

The previous prime is 731278129. The next prime is 731278159. The reversal of 731278141 is 141872137.

It can be written as a sum of positive squares in only one way, i.e., 705114916 + 26163225 = 26554^2 + 5115^2 .

It is not a de Polignac number, because 731278141 - 2⁹ = 731277629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 731278097 and 731278106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731278241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3021690 + ... + 3021931.

Almost surely, 2^731278141 is an apocalyptic number.

It is an amenable number.

731278141 is a deficient number, since it is larger than the sum of its proper divisors (72523585).

731278141 is a wasteful number, since it uses less digits than its factorization.

731278141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6043643 (or 6043632 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 731278141 is about 27042.1548882481. The cubic root of 731278141 is about 900.9365317001.

It can be divided in two parts, 731 and 278141, that added together give a palindrome (278872).

The spelling of 731278141 in words is "seven hundred thirty-one million, two hundred seventy-eight thousand, one hundred forty-one".