125551101 has 32 divisors (see below), whose sum is σ = 186617088. Its totient is φ = 74580480.

The previous prime is 125551093. The next prime is 125551123. The reversal of 125551101 is 101155521.

It is not a de Polignac number, because 125551101 - 2³ = 125551093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125551201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240721 + ... + 241241.

It is an arithmetic number, because the mean of its divisors is an integer number (5831784).

Almost surely, 2^125551101 is an apocalyptic number.

It is an amenable number.

125551101 is a deficient number, since it is larger than the sum of its proper divisors (61065987).

125551101 is a wasteful number, since it uses less digits than its factorization.

125551101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741.

The product of its (nonzero) digits is 250, while the sum is 21.

The square root of 125551101 is about 11204.9587683311. The cubic root of 125551101 is about 500.7337241045.

The spelling of 125551101 in words is "one hundred twenty-five million, five hundred fifty-one thousand, one hundred one".