581479252 has 6 divisors (see below), whose sum is σ = 1017588698. Its totient is φ = 290739624.

The previous prime is 581479247. The next prime is 581479259. The reversal of 581479252 is 252974185.

It can be written as a sum of positive squares in only one way, i.e., 292615236 + 288864016 = 17106^2 + 16996^2 .

It is a junction number, because it is equal to n+sod(n) for n = 581479199 and 581479208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581479259) 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, 72684903 + ... + 72684910.

Almost surely, 2^581479252 is an apocalyptic number.

It is an amenable number.

581479252 is a deficient number, since it is larger than the sum of its proper divisors (436109446).

581479252 is a wasteful number, since it uses less digits than its factorization.

581479252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145369817 (or 145369815 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The square root of 581479252 is about 24113.8808987687. The cubic root of 581479252 is about 834.6634722625.

The spelling of 581479252 in words is "five hundred eighty-one million, four hundred seventy-nine thousand, two hundred fifty-two".