61257751 has 2 divisors, whose sum is σ = 61257752. Its totient is φ = 61257750.

The previous prime is 61257733. The next prime is 61257761. The reversal of 61257751 is 15775216.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61257751 - 2¹¹ = 61255703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61257701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30628875 + 30628876.

It is an arithmetic number, because the mean of its divisors is an integer number (30628876).

Almost surely, 2^61257751 is an apocalyptic number.

61257751 is a deficient number, since it is larger than the sum of its proper divisors (1).

61257751 is an equidigital number, since it uses as much as digits as its factorization.

61257751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 34.

The square root of 61257751 is about 7826.7330988095. The cubic root of 61257751 is about 394.2033851631.

The spelling of 61257751 in words is "sixty-one million, two hundred fifty-seven thousand, seven hundred fifty-one".