61345123 has 4 divisors (see below), whose sum is σ = 70108720. Its totient is φ = 52581528.

The previous prime is 61345103. The next prime is 61345139. The reversal of 61345123 is 32154316.

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 61345123 - 2¹⁷ = 61214051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61345103) 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, 4381788 + ... + 4381801.

It is an arithmetic number, because the mean of its divisors is an integer number (17527180).

Almost surely, 2^61345123 is an apocalyptic number.

61345123 is a deficient number, since it is larger than the sum of its proper divisors (8763597).

61345123 is an equidigital number, since it uses as much as digits as its factorization.

61345123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8763596.

The product of its digits is 2160, while the sum is 25.

The square root of 61345123 is about 7832.3127491182. The cubic root of 61345123 is about 394.3907137080.

Adding to 61345123 its reverse (32154316), we get a palindrome (93499439).

The spelling of 61345123 in words is "sixty-one million, three hundred forty-five thousand, one hundred twenty-three".