61127021 has 2 divisors, whose sum is σ = 61127022. Its totient is φ = 61127020.

The previous prime is 61126991. The next prime is 61127039. The reversal of 61127021 is 12072116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59136100 + 1990921 = 7690^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 61127021 - 2⁶ = 61126957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61126984 and 61127002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61127051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30563510 + 30563511.

It is an arithmetic number, because the mean of its divisors is an integer number (30563511).

Almost surely, 2^61127021 is an apocalyptic number.

It is an amenable number.

61127021 is a deficient number, since it is larger than the sum of its proper divisors (1).

61127021 is an equidigital number, since it uses as much as digits as its factorization.

61127021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 61127021 is about 7818.3771333954. The cubic root of 61127021 is about 393.9227626519.

Adding to 61127021 its reverse (12072116), we get a palindrome (73199137).

The spelling of 61127021 in words is "sixty-one million, one hundred twenty-seven thousand, twenty-one".