61026401 has 2 divisors, whose sum is σ = 61026402. Its totient is φ = 61026400.

The previous prime is 61026397. The next prime is 61026437. The reversal of 61026401 is 10462016.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54390625 + 6635776 = 7375^2 + 2576^2 .

It is a cyclic number.

It is not a de Polignac number, because 61026401 - 2² = 61026397 is a prime.

It is not a weakly prime, because it can be changed into another prime (61026451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30513200 + 30513201.

It is an arithmetic number, because the mean of its divisors is an integer number (30513201).

Almost surely, 2^61026401 is an apocalyptic number.

It is an amenable number.

61026401 is a deficient number, since it is larger than the sum of its proper divisors (1).

61026401 is an equidigital number, since it uses as much as digits as its factorization.

61026401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 61026401 is about 7811.9396439041. The cubic root of 61026401 is about 393.7065010820.

Adding to 61026401 its reverse (10462016), we get a palindrome (71488417).

The spelling of 61026401 in words is "sixty-one million, twenty-six thousand, four hundred one".