61161305 has 8 divisors (see below), whose sum is σ = 73437000. Its totient is φ = 48900096.

The previous prime is 61161281. The next prime is 61161329. The reversal of 61161305 is 50316116.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61161281) and next prime (61161329).

It can be written as a sum of positive squares in 4 ways, for example, as 1315609 + 59845696 = 1147^2 + 7736^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61161305 - 2⁸ = 61161049 is a prime.

It is a super-3 number, since 3×61161305³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11171 + ... + 15719.

It is an arithmetic number, because the mean of its divisors is an integer number (9179625).

Almost surely, 2^61161305 is an apocalyptic number.

It is an amenable number.

61161305 is a deficient number, since it is larger than the sum of its proper divisors (12275695).

61161305 is a wasteful number, since it uses less digits than its factorization.

61161305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7243.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 61161305 is about 7820.5693526750. The cubic root of 61161305 is about 393.9963947036.

It can be divided in two parts, 611 and 61305, that added together give a palindrome (61916).

The spelling of 61161305 in words is "sixty-one million, one hundred sixty-one thousand, three hundred five".