725217461 has 2 divisors, whose sum is σ = 725217462. Its totient is φ = 725217460.

The previous prime is 725217457. The next prime is 725217469. The reversal of 725217461 is 164712527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 708358225 + 16859236 = 26615^2 + 4106^2 .

It is a cyclic number.

It is not a de Polignac number, because 725217461 - 2² = 725217457 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725217469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362608730 + 362608731.

It is an arithmetic number, because the mean of its divisors is an integer number (362608731).

Almost surely, 2^725217461 is an apocalyptic number.

It is an amenable number.

725217461 is a deficient number, since it is larger than the sum of its proper divisors (1).

725217461 is an equidigital number, since it uses as much as digits as its factorization.

725217461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 35.

The square root of 725217461 is about 26929.8618823046. The cubic root of 725217461 is about 898.4406995733.

Adding to 725217461 its reverse (164712527), we get a palindrome (889929988).

The spelling of 725217461 in words is "seven hundred twenty-five million, two hundred seventeen thousand, four hundred sixty-one".