61243261 has 8 divisors (see below), whose sum is σ = 61871040. Its totient is φ = 60618432.

The previous prime is 61243229. The next prime is 61243267. The reversal of 61243261 is 16234216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61243261 - 2⁵ = 61243229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61243267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82056 + ... + 82798.

It is an arithmetic number, because the mean of its divisors is an integer number (7733880).

Almost surely, 2^61243261 is an apocalyptic number.

It is an amenable number.

61243261 is a deficient number, since it is larger than the sum of its proper divisors (627779).

61243261 is a wasteful number, since it uses less digits than its factorization.

61243261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475.

The product of its digits is 1728, while the sum is 25.

The square root of 61243261 is about 7825.8073704890. The cubic root of 61243261 is about 394.1723008927.

Adding to 61243261 its reverse (16234216), we get a palindrome (77477477).

It can be divided in two parts, 61243 and 261, that added together give a square (61504 = 248²).

The spelling of 61243261 in words is "sixty-one million, two hundred forty-three thousand, two hundred sixty-one".