61051421 has 2 divisors, whose sum is σ = 61051422. Its totient is φ = 61051420.

The previous prime is 61051411. The next prime is 61051429. The reversal of 61051421 is 12415016.

61051421 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., 42432196 + 18619225 = 6514^2 + 4315^2 .

It is a cyclic number.

It is not a de Polignac number, because 61051421 - 2²² = 56857117 is a prime.

It is a super-2 number, since 2×61051421² = 7454552012238482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61051393 and 61051402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61051429) 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, 30525710 + 30525711.

It is an arithmetic number, because the mean of its divisors is an integer number (30525711).

Almost surely, 2^61051421 is an apocalyptic number.

It is an amenable number.

61051421 is a deficient number, since it is larger than the sum of its proper divisors (1).

61051421 is an equidigital number, since it uses as much as digits as its factorization.

61051421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 61051421 is about 7813.5408746611. The cubic root of 61051421 is about 393.7602985129.

Adding to 61051421 its reverse (12415016), we get a palindrome (73466437).

The spelling of 61051421 in words is "sixty-one million, fifty-one thousand, four hundred twenty-one".