125524109 has 4 divisors (see below), whose sum is σ = 125622780. Its totient is φ = 125425440.

The previous prime is 125524103. The next prime is 125524117. The reversal of 125524109 is 901425521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 901425521 = 113 ⋅7977217.

It can be written as a sum of positive squares in 2 ways, for example, as 102961609 + 22562500 = 10147^2 + 4750^2 .

It is a cyclic number.

It is not a de Polignac number, because 125524109 - 2¹² = 125520013 is a prime.

It is a super-3 number, since 3×125524109³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125524103) 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, 47402 + ... + 49979.

It is an arithmetic number, because the mean of its divisors is an integer number (31405695).

Almost surely, 2^125524109 is an apocalyptic number.

It is an amenable number.

125524109 is a deficient number, since it is larger than the sum of its proper divisors (98671).

125524109 is an equidigital number, since it uses as much as digits as its factorization.

125524109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98670.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 125524109 is about 11203.7542368619. The cubic root of 125524109 is about 500.6978375923.

It can be divided in two parts, 12552 and 4109, that added together give a palindrome (16661).

The spelling of 125524109 in words is "one hundred twenty-five million, five hundred twenty-four thousand, one hundred nine".