61145873 has 4 divisors (see below), whose sum is σ = 61164528. Its totient is φ = 61127220.

The previous prime is 61145869. The next prime is 61145893. The reversal of 61145873 is 37854116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61145873 - 2² = 61145869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61145803) 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, 2963 + ... + 11448.

It is an arithmetic number, because the mean of its divisors is an integer number (15291132).

Almost surely, 2^61145873 is an apocalyptic number.

It is an amenable number.

61145873 is a deficient number, since it is larger than the sum of its proper divisors (18655).

61145873 is a wasteful number, since it uses less digits than its factorization.

61145873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18654.

The product of its digits is 20160, while the sum is 35.

The square root of 61145873 is about 7819.5826614980. The cubic root of 61145873 is about 393.9632546662.

Adding to 61145873 its reverse (37854116), we get a palindrome (98999989).

The spelling of 61145873 in words is "sixty-one million, one hundred forty-five thousand, eight hundred seventy-three".