61045071 has 4 divisors (see below), whose sum is σ = 81393432. Its totient is φ = 40696712.

The previous prime is 61045063. The next prime is 61045091. The reversal of 61045071 is 17054016.

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

It is a cyclic number.

It is not a de Polignac number, because 61045071 - 2³ = 61045063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61045031) 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, 10174176 + ... + 10174181.

It is an arithmetic number, because the mean of its divisors is an integer number (20348358).

Almost surely, 2^61045071 is an apocalyptic number.

61045071 is a deficient number, since it is larger than the sum of its proper divisors (20348361).

61045071 is a wasteful number, since it uses less digits than its factorization.

61045071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20348360.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 61045071 is about 7813.1345182327. The cubic root of 61045071 is about 393.7466462803.

Adding to 61045071 its reverse (17054016), we get a palindrome (78099087).

It can be divided in two parts, 6104 and 5071, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 61045071 in words is "sixty-one million, forty-five thousand, seventy-one".