61259161 has 4 divisors (see below), whose sum is σ = 62914852. Its totient is φ = 59603472.

The previous prime is 61259153. The next prime is 61259167. The reversal of 61259161 is 16195216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41731600 + 19527561 = 6460^2 + 4419^2 .

It is a cyclic number.

It is not a de Polignac number, because 61259161 - 2³ = 61259153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61259167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827790 + ... + 827863.

It is an arithmetic number, because the mean of its divisors is an integer number (15728713).

Almost surely, 2^61259161 is an apocalyptic number.

It is an amenable number.

61259161 is a deficient number, since it is larger than the sum of its proper divisors (1655691).

61259161 is a wasteful number, since it uses less digits than its factorization.

61259161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655690.

The product of its digits is 3240, while the sum is 31.

The square root of 61259161 is about 7826.8231741876. The cubic root of 61259161 is about 394.2064096648.

The spelling of 61259161 in words is "sixty-one million, two hundred fifty-nine thousand, one hundred sixty-one".