61000421 has 2 divisors, whose sum is σ = 61000422. Its totient is φ = 61000420.

The previous prime is 61000417. The next prime is 61000441. The reversal of 61000421 is 12400016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37039396 + 23961025 = 6086^2 + 4895^2 .

It is a cyclic number.

It is not a de Polignac number, because 61000421 - 2² = 61000417 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61000396 and 61000405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61000441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30500210 + 30500211.

It is an arithmetic number, because the mean of its divisors is an integer number (30500211).

Almost surely, 2^61000421 is an apocalyptic number.

It is an amenable number.

61000421 is a deficient number, since it is larger than the sum of its proper divisors (1).

61000421 is an equidigital number, since it uses as much as digits as its factorization.

61000421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 61000421 is about 7810.2766276234. The cubic root of 61000421 is about 393.6506239176.

Adding to 61000421 its reverse (12400016), we get a palindrome (73400437).

The spelling of 61000421 in words is "sixty-one million, four hundred twenty-one", and thus it is an aban number.