61245123 has 4 divisors (see below), whose sum is σ = 81660168. Its totient is φ = 40830080.

The previous prime is 61245091. The next prime is 61245137. The reversal of 61245123 is 32154216.

61245123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61245123 - 2⁵ = 61245091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61245093 and 61245102.

It is not an unprimeable number, because it can be changed into a prime (61245143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10207518 + ... + 10207523.

It is an arithmetic number, because the mean of its divisors is an integer number (20415042).

Almost surely, 2^61245123 is an apocalyptic number.

61245123 is a deficient number, since it is larger than the sum of its proper divisors (20415045).

61245123 is a wasteful number, since it uses less digits than its factorization.

61245123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20415044.

The product of its digits is 1440, while the sum is 24.

The square root of 61245123 is about 7825.9263349459. The cubic root of 61245123 is about 394.1762955711.

Adding to 61245123 its reverse (32154216), we get a palindrome (93399339).

The spelling of 61245123 in words is "sixty-one million, two hundred forty-five thousand, one hundred twenty-three".