61145123 has 4 divisors (see below), whose sum is σ = 65848608. Its totient is φ = 56441640.

The previous prime is 61145111. The next prime is 61145177. The reversal of 61145123 is 32154116.

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 61145123 - 2¹⁰ = 61144099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61145323) 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, 2351723 + ... + 2351748.

It is an arithmetic number, because the mean of its divisors is an integer number (16462152).

Almost surely, 2^61145123 is an apocalyptic number.

61145123 is a deficient number, since it is larger than the sum of its proper divisors (4703485).

61145123 is a wasteful number, since it uses less digits than its factorization.

61145123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703484.

The product of its digits is 720, while the sum is 23.

The square root of 61145123 is about 7819.5347048274. The cubic root of 61145123 is about 393.9616439080.

Adding to 61145123 its reverse (32154116), we get a palindrome (93299239).

The spelling of 61145123 in words is "sixty-one million, one hundred forty-five thousand, one hundred twenty-three".