61250521 has 2 divisors, whose sum is σ = 61250522. Its totient is φ = 61250520.

The previous prime is 61250461. The next prime is 61250543. The reversal of 61250521 is 12505216.

It is an a-pointer prime, because the next prime (61250543) can be obtained adding 61250521 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54169600 + 7080921 = 7360^2 + 2661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61250521 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 61250492 and 61250501.

It is not a weakly prime, because it can be changed into another prime (61250551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30625260 + 30625261.

It is an arithmetic number, because the mean of its divisors is an integer number (30625261).

Almost surely, 2^61250521 is an apocalyptic number.

It is an amenable number.

61250521 is a deficient number, since it is larger than the sum of its proper divisors (1).

61250521 is an equidigital number, since it uses as much as digits as its factorization.

61250521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 61250521 is about 7826.2712066475. The cubic root of 61250521 is about 394.1878758190.

Adding to 61250521 its reverse (12505216), we get a palindrome (73755737).

The spelling of 61250521 in words is "sixty-one million, two hundred fifty thousand, five hundred twenty-one".