125428031 has 4 divisors (see below), whose sum is σ = 125455632. Its totient is φ = 125400432.

The previous prime is 125428027. The next prime is 125428111. The reversal of 125428031 is 130824521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130824521 = 983 ⋅133087.

It is a cyclic number.

It is not a de Polignac number, because 125428031 - 2² = 125428027 is a prime.

It is a super-2 number, since 2×125428031² = 31464381921073922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125428001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5195 + ... + 16668.

It is an arithmetic number, because the mean of its divisors is an integer number (31363908).

Almost surely, 2^125428031 is an apocalyptic number.

125428031 is a deficient number, since it is larger than the sum of its proper divisors (27601).

125428031 is an equidigital number, since it uses as much as digits as its factorization.

125428031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27600.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 125428031 is about 11199.4656568963. The cubic root of 125428031 is about 500.5700578212.

The spelling of 125428031 in words is "one hundred twenty-five million, four hundred twenty-eight thousand, thirty-one".