125343421 has 6 divisors (see below), whose sum is σ = 145807710. Its totient is φ = 107437176.

The previous prime is 125343403. The next prime is 125343451. The reversal of 125343421 is 124343521.

It can be written as a sum of positive squares in only one way, i.e., 123876900 + 1466521 = 11130^2 + 1211^2 .

It is not a de Polignac number, because 125343421 - 2¹¹ = 125341373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125343451) 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 5 ways as a sum of consecutive naturals, for example, 1278966 + ... + 1279063.

It is an arithmetic number, because the mean of its divisors is an integer number (24301285).

Almost surely, 2^125343421 is an apocalyptic number.

It is an amenable number.

125343421 is a deficient number, since it is larger than the sum of its proper divisors (20464289).

125343421 is an equidigital number, since it uses as much as digits as its factorization.

125343421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558043 (or 2558036 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 125343421 is about 11195.6876072888. The cubic root of 125343421 is about 500.4574759705.

Adding to 125343421 its reverse (124343521), we get a palindrome (249686942).

The spelling of 125343421 in words is "one hundred twenty-five million, three hundred forty-three thousand, four hundred twenty-one".