125818433 has 4 divisors (see below), whose sum is σ = 135496788. Its totient is φ = 116140080.

The previous prime is 125818421. The next prime is 125818447. The reversal of 125818433 is 334818521.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 84125584 + 41692849 = 9172^2 + 6457^2 .

It is a cyclic number.

It is not a de Polignac number, because 125818433 - 2¹⁶ = 125752897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125818393 and 125818402.

It is not an unprimeable number, because it can be changed into a prime (125818403) 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, 4839158 + ... + 4839183.

It is an arithmetic number, because the mean of its divisors is an integer number (33874197).

Almost surely, 2^125818433 is an apocalyptic number.

125818433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

125818433 is a deficient number, since it is larger than the sum of its proper divisors (9678355).

125818433 is an equidigital number, since it uses as much as digits as its factorization.

125818433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9678354.

The product of its digits is 23040, while the sum is 35.

The square root of 125818433 is about 11216.8816076484. The cubic root of 125818433 is about 501.0888709986.

It can be divided in two parts, 1258 and 18433, that added together give a palindrome (19691).

The spelling of 125818433 in words is "one hundred twenty-five million, eight hundred eighteen thousand, four hundred thirty-three".