125405231 has 8 divisors (see below), whose sum is σ = 143442720. Its totient is φ = 107398368.

The previous prime is 125405219. The next prime is 125405233. The reversal of 125405231 is 132504521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-125405231 is a prime.

It is a super-2 number, since 2×125405231² = 31452943924326722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125405197 and 125405206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125405233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1925 + ... + 15953.

It is an arithmetic number, because the mean of its divisors is an integer number (17930340).

Almost surely, 2^125405231 is an apocalyptic number.

125405231 is a deficient number, since it is larger than the sum of its proper divisors (18037489).

125405231 is a wasteful number, since it uses less digits than its factorization.

125405231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15313.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 125405231 is about 11198.4477049277. The cubic root of 125405231 is about 500.5397251838.

Adding to 125405231 its reverse (132504521), we get a palindrome (257909752).

It can be divided in two parts, 12540 and 5231, that added together give a palindrome (17771).

The spelling of 125405231 in words is "one hundred twenty-five million, four hundred five thousand, two hundred thirty-one".