61244921 has 2 divisors, whose sum is σ = 61244922. Its totient is φ = 61244920.

The previous prime is 61244903. The next prime is 61244959. The reversal of 61244921 is 12944216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48720400 + 12524521 = 6980^2 + 3539^2 .

It is a cyclic number.

It is not a de Polignac number, because 61244921 - 2¹⁸ = 60982777 is a prime.

It is not a weakly prime, because it can be changed into another prime (61244221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30622460 + 30622461.

It is an arithmetic number, because the mean of its divisors is an integer number (30622461).

Almost surely, 2^61244921 is an apocalyptic number.

It is an amenable number.

61244921 is a deficient number, since it is larger than the sum of its proper divisors (1).

61244921 is an equidigital number, since it uses as much as digits as its factorization.

61244921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 61244921 is about 7825.9134291148. The cubic root of 61244921 is about 394.1758622103.

The spelling of 61244921 in words is "sixty-one million, two hundred forty-four thousand, nine hundred twenty-one".