125642425 has 6 divisors (see below), whose sum is σ = 155796638. Its totient is φ = 100513920.

The previous prime is 125642401. The next prime is 125642441. The reversal of 125642425 is 524246521.

It can be written as a sum of positive squares in 3 ways, for example, as 23551609 + 102090816 = 4853^2 + 10104^2 .

It is not a de Polignac number, because 125642425 - 2⁹ = 125641913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 2512824 + ... + 2512873.

Almost surely, 2^125642425 is an apocalyptic number.

It is an amenable number.

125642425 is a deficient number, since it is larger than the sum of its proper divisors (30154213).

125642425 is an equidigital number, since it uses as much as digits as its factorization.

125642425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5025707 (or 5025702 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 125642425 is about 11209.0331875680. The cubic root of 125642425 is about 500.8551034292.

Adding to 125642425 its reverse (524246521), we get a palindrome (649888946).

It can be divided in two parts, 1256 and 42425, that added together give a square (43681 = 209²).

The spelling of 125642425 in words is "one hundred twenty-five million, six hundred forty-two thousand, four hundred twenty-five".