61149421 has 2 divisors, whose sum is σ = 61149422. Its totient is φ = 61149420.

The previous prime is 61149401. The next prime is 61149427. The reversal of 61149421 is 12494116.

61149421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59675625 + 1473796 = 7725^2 + 1214^2 .

It is a cyclic number.

It is not a de Polignac number, because 61149421 - 2¹⁹ = 60625133 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61149421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61149427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30574710 + 30574711.

It is an arithmetic number, because the mean of its divisors is an integer number (30574711).

Almost surely, 2^61149421 is an apocalyptic number.

It is an amenable number.

61149421 is a deficient number, since it is larger than the sum of its proper divisors (1).

61149421 is an equidigital number, since it uses as much as digits as its factorization.

61149421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 61149421 is about 7819.8095245345. The cubic root of 61149421 is about 393.9708744478.

The spelling of 61149421 in words is "sixty-one million, one hundred forty-nine thousand, four hundred twenty-one".