106520725 has 24 divisors (see below), whose sum is σ = 142524360. Its totient is φ = 78673920.

The previous prime is 106520723. The next prime is 106520749. The reversal of 106520725 is 527025601.

It can be written as a sum of positive squares in 12 ways, for example, as 33281361 + 73239364 = 5769^2 + 8558^2 .

It is not a de Polignac number, because 106520725 - 2¹ = 106520723 is a prime.

It is a super-2 number, since 2×106520725² = 22693329709051250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 106520693 and 106520702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106520723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20161 + ... + 24889.

It is an arithmetic number, because the mean of its divisors is an integer number (5938515).

Almost surely, 2^106520725 is an apocalyptic number.

It is an amenable number.

106520725 is a deficient number, since it is larger than the sum of its proper divisors (36003635).

106520725 is a wasteful number, since it uses less digits than its factorization.

106520725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809 (or 4804 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 106520725 is about 10320.8878009598. The cubic root of 106520725 is about 474.0360506564.

The spelling of 106520725 in words is "one hundred six million, five hundred twenty thousand, seven hundred twenty-five".