61145071 has 8 divisors (see below), whose sum is σ = 66832304. Its totient is φ = 55598400.

The previous prime is 61145069. The next prime is 61145083. The reversal of 61145071 is 17054116.

It is a happy number.

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

It is not a de Polignac number, because 61145071 - 2¹ = 61145069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61140071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34230 + ... + 35971.

It is an arithmetic number, because the mean of its divisors is an integer number (8354038).

Almost surely, 2^61145071 is an apocalyptic number.

61145071 is a deficient number, since it is larger than the sum of its proper divisors (5687233).

61145071 is a wasteful number, since it uses less digits than its factorization.

61145071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70281.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 61145071 is about 7819.5313798207. The cubic root of 61145071 is about 393.9615322283.

Adding to 61145071 its reverse (17054116), we get a palindrome (78199187).

The spelling of 61145071 in words is "sixty-one million, one hundred forty-five thousand, seventy-one".