61272751 has 2 divisors, whose sum is σ = 61272752. Its totient is φ = 61272750.

The previous prime is 61272733. The next prime is 61272767. The reversal of 61272751 is 15727216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61272751 - 2⁵ = 61272719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61272251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30636375 + 30636376.

It is an arithmetic number, because the mean of its divisors is an integer number (30636376).

Almost surely, 2^61272751 is an apocalyptic number.

61272751 is a deficient number, since it is larger than the sum of its proper divisors (1).

61272751 is an equidigital number, since it uses as much as digits as its factorization.

61272751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 31.

The square root of 61272751 is about 7827.6912943728. The cubic root of 61272751 is about 394.2355583336.

Adding to 61272751 its reverse (15727216), we get a palindrome (76999967).

The spelling of 61272751 in words is "sixty-one million, two hundred seventy-two thousand, seven hundred fifty-one".