71739225 has 18 divisors (see below), whose sum is σ = 128493326. Its totient is φ = 38260800.

The previous prime is 71739223. The next prime is 71739229. The reversal of 71739225 is 52293717.

It can be written as a sum of positive squares in 3 ways, for example, as 14040009 + 57699216 = 3747^2 + 7596^2 .

It is not a de Polignac number, because 71739225 - 2¹ = 71739223 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 71739225.

It is not an unprimeable number, because it can be changed into a prime (71739223) 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 in 17 ways as a sum of consecutive naturals, for example, 159196 + ... + 159645.

Almost surely, 2^71739225 is an apocalyptic number.

71739225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71739225 is a deficient number, since it is larger than the sum of its proper divisors (56754101).

71739225 is a wasteful number, since it uses less digits than its factorization.

71739225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318857 (or 318849 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 71739225 is about 8469.9011210285. The cubic root of 71739225 is about 415.5139034477.

The spelling of 71739225 in words is "seventy-one million, seven hundred thirty-nine thousand, two hundred twenty-five".