61324561 has 9 divisors (see below), whose sum is σ = 63187579. Its totient is φ = 59515600.

The previous prime is 61324553. The next prime is 61324567. The reversal of 61324561 is 16542316.

The square root of 61324561 is 7831.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2954961 + 58369600 = 1719^2 + 7640^2 .

It is not a de Polignac number, because 61324561 - 2³ = 61324553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61324567) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 320976 + ... + 321166.

Almost surely, 2^61324561 is an apocalyptic number.

61324561 is the 7831-st square number.

61324561 is the 3916-th centered octagonal number.

It is an amenable number.

61324561 is a deficient number, since it is larger than the sum of its proper divisors (1863018).

61324561 is an frugal number, since it uses more digits than its factorization.

61324561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 232 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The cubic root of 61324561 is about 394.3466440918.

Adding to 61324561 its reverse (16542316), we get a palindrome (77866877).

The spelling of 61324561 in words is "sixty-one million, three hundred twenty-four thousand, five hundred sixty-one".