125783123 has 4 divisors (see below), whose sum is σ = 125822928. Its totient is φ = 125743320.

The previous prime is 125783111. The next prime is 125783131. The reversal of 125783123 is 321387521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125783123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125783123.

It is not an unprimeable number, because it can be changed into a prime (125783183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14711 + ... + 21632.

It is an arithmetic number, because the mean of its divisors is an integer number (31455732).

Almost surely, 2^125783123 is an apocalyptic number.

125783123 is a deficient number, since it is larger than the sum of its proper divisors (39805).

125783123 is an equidigital number, since it uses as much as digits as its factorization.

125783123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39804.

The product of its digits is 10080, while the sum is 32.

The square root of 125783123 is about 11215.3075303355. The cubic root of 125783123 is about 501.0419910011.

The spelling of 125783123 in words is "one hundred twenty-five million, seven hundred eighty-three thousand, one hundred twenty-three".