125312123 has 2 divisors, whose sum is σ = 125312124. Its totient is φ = 125312122.

The previous prime is 125312101. The next prime is 125312147. The reversal of 125312123 is 321213521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125312123 - 2¹⁸ = 125049979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125312095 and 125312104.

It is not a weakly prime, because it can be changed into another prime (125312153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62656061 + 62656062.

It is an arithmetic number, because the mean of its divisors is an integer number (62656062).

Almost surely, 2^125312123 is an apocalyptic number.

125312123 is a deficient number, since it is larger than the sum of its proper divisors (1).

125312123 is an equidigital number, since it uses as much as digits as its factorization.

125312123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 20.

The square root of 125312123 is about 11194.2897496893. The cubic root of 125312123 is about 500.4158180948.

Adding to 125312123 its reverse (321213521), we get a palindrome (446525644).

It can be divided in two parts, 12 and 5312123, that added together give a palindrome (5312135).

The spelling of 125312123 in words is "one hundred twenty-five million, three hundred twelve thousand, one hundred twenty-three".