61130621 has 2 divisors, whose sum is σ = 61130622. Its totient is φ = 61130620.

The previous prime is 61130617. The next prime is 61130639. The reversal of 61130621 is 12603116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60295225 + 835396 = 7765^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 61130621 - 2² = 61130617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61130593 and 61130602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61130651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30565310 + 30565311.

It is an arithmetic number, because the mean of its divisors is an integer number (30565311).

Almost surely, 2^61130621 is an apocalyptic number.

It is an amenable number.

61130621 is a deficient number, since it is larger than the sum of its proper divisors (1).

61130621 is an equidigital number, since it uses as much as digits as its factorization.

61130621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 61130621 is about 7818.6073568123. The cubic root of 61130621 is about 393.9304956975.

Adding to 61130621 its reverse (12603116), we get a palindrome (73733737).

The spelling of 61130621 in words is "sixty-one million, one hundred thirty thousand, six hundred twenty-one".