61392521 has 2 divisors, whose sum is σ = 61392522. Its totient is φ = 61392520.

The previous prime is 61392517. The next prime is 61392533. The reversal of 61392521 is 12529316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43414921 + 17977600 = 6589^2 + 4240^2 .

It is a cyclic number.

It is not a de Polignac number, because 61392521 - 2² = 61392517 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61392571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30696260 + 30696261.

It is an arithmetic number, because the mean of its divisors is an integer number (30696261).

Almost surely, 2^61392521 is an apocalyptic number.

It is an amenable number.

61392521 is a deficient number, since it is larger than the sum of its proper divisors (1).

61392521 is an equidigital number, since it uses as much as digits as its factorization.

61392521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 61392521 is about 7835.3379633555. The cubic root of 61392521 is about 394.4922622244.

The spelling of 61392521 in words is "sixty-one million, three hundred ninety-two thousand, five hundred twenty-one".