61500123 has 12 divisors (see below), whose sum is σ = 91000728. Its totient is φ = 39999840.

The previous prime is 61500113. The next prime is 61500149. The reversal of 61500123 is 32100516.

It is not a de Polignac number, because 61500123 - 2⁴ = 61500107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61500096 and 61500105.

It is not an unprimeable number, because it can be changed into a prime (61500113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82965 + ... + 83702.

It is an arithmetic number, because the mean of its divisors is an integer number (7583394).

Almost surely, 2^61500123 is an apocalyptic number.

61500123 is a deficient number, since it is larger than the sum of its proper divisors (29500605).

61500123 is a wasteful number, since it uses less digits than its factorization.

61500123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166714 (or 166711 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 61500123 is about 7842.2014128687. The cubic root of 61500123 is about 394.7226017965.

Adding to 61500123 its reverse (32100516), we get a palindrome (93600639).

The spelling of 61500123 in words is "sixty-one million, five hundred thousand, one hundred twenty-three".