125442101 has 4 divisors (see below), whose sum is σ = 126684204. Its totient is φ = 124200000.

The previous prime is 125442077. The next prime is 125442143. The reversal of 125442101 is 101244521.

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 95082001 + 30360100 = 9751^2 + 5510^2 .

It is a cyclic number.

It is not a de Polignac number, because 125442101 - 2¹⁰ = 125441077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125442601) 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, 620900 + ... + 621101.

It is an arithmetic number, because the mean of its divisors is an integer number (31671051).

Almost surely, 2^125442101 is an apocalyptic number.

It is an amenable number.

125442101 is a deficient number, since it is larger than the sum of its proper divisors (1242103).

125442101 is a wasteful number, since it uses less digits than its factorization.

125442101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242102.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 125442101 is about 11200.0937942501. The cubic root of 125442101 is about 500.5887744172.

Adding to 125442101 its reverse (101244521), we get a palindrome (226686622).

The spelling of 125442101 in words is "one hundred twenty-five million, four hundred forty-two thousand, one hundred one".