125555101 has 6 divisors (see below), whose sum is σ = 146053950. Its totient is φ = 107618616.

The previous prime is 125555099. The next prime is 125555117. The reversal of 125555101 is 101555521.

It can be written as a sum of positive squares in only one way, i.e., 107619876 + 17935225 = 10374^2 + 4235^2 .

It is not a de Polignac number, because 125555101 - 2¹ = 125555099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125555501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1281126 + ... + 1281223.

It is an arithmetic number, because the mean of its divisors is an integer number (24342325).

Almost surely, 2^125555101 is an apocalyptic number.

It is an amenable number.

125555101 is a deficient number, since it is larger than the sum of its proper divisors (20498849).

125555101 is an equidigital number, since it uses as much as digits as its factorization.

125555101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562363 (or 2562356 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 125555101 is about 11205.1372593110. The cubic root of 125555101 is about 500.7390417630.

The spelling of 125555101 in words is "one hundred twenty-five million, five hundred fifty-five thousand, one hundred one".