61457161 has 2 divisors, whose sum is σ = 61457162. Its totient is φ = 61457160.

The previous prime is 61457147. The next prime is 61457171. The reversal of 61457161 is 16175416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43309561 + 18147600 = 6581^2 + 4260^2 .

It is a cyclic number.

It is not a de Polignac number, because 61457161 - 2¹³ = 61448969 is a prime.

It is not a weakly prime, because it can be changed into another prime (61457171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30728580 + 30728581.

It is an arithmetic number, because the mean of its divisors is an integer number (30728581).

Almost surely, 2^61457161 is an apocalyptic number.

It is an amenable number.

61457161 is a deficient number, since it is larger than the sum of its proper divisors (1).

61457161 is an equidigital number, since it uses as much as digits as its factorization.

61457161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 61457161 is about 7839.4617799948. The cubic root of 61457161 is about 394.6306668977.

It can be divided in two parts, 614 and 57161, that added together give a palindrome (57775).

The spelling of 61457161 in words is "sixty-one million, four hundred fifty-seven thousand, one hundred sixty-one".