61227457 has 2 divisors, whose sum is σ = 61227458. Its totient is φ = 61227456.

The previous prime is 61227451. The next prime is 61227601. The reversal of 61227457 is 75472216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46908801 + 14318656 = 6849^2 + 3784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61227457 is a prime.

It is not a weakly prime, because it can be changed into another prime (61227451) 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, 30613728 + 30613729.

It is an arithmetic number, because the mean of its divisors is an integer number (30613729).

Almost surely, 2^61227457 is an apocalyptic number.

It is an amenable number.

61227457 is a deficient number, since it is larger than the sum of its proper divisors (1).

61227457 is an equidigital number, since it uses as much as digits as its factorization.

61227457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 34.

The square root of 61227457 is about 7824.7975692666. The cubic root of 61227457 is about 394.1383922097.

The spelling of 61227457 in words is "sixty-one million, two hundred twenty-seven thousand, four hundred fifty-seven".