125540101 has 4 divisors (see below), whose sum is σ = 129869100. Its totient is φ = 121211104.

The previous prime is 125540083. The next prime is 125540113. The reversal of 125540101 is 101045521.

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 69739201 + 55800900 = 8351^2 + 7470^2 .

It is a cyclic number.

It is not a de Polignac number, because 125540101 - 2⁵ = 125540069 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 (125540161) 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, 2164456 + ... + 2164513.

It is an arithmetic number, because the mean of its divisors is an integer number (32467275).

Almost surely, 2^125540101 is an apocalyptic number.

It is an amenable number.

125540101 is a deficient number, since it is larger than the sum of its proper divisors (4328999).

125540101 is an equidigital number, since it uses as much as digits as its factorization.

125540101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328998.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 125540101 is about 11204.4679034749. The cubic root of 125540101 is about 500.7190999614.

Adding to 125540101 its reverse (101045521), we get a palindrome (226585622).

The spelling of 125540101 in words is "one hundred twenty-five million, five hundred forty thousand, one hundred one".