125159549 has 4 divisors (see below), whose sum is σ = 125430336. Its totient is φ = 124888764.

The previous prime is 125159539. The next prime is 125159561. The reversal of 125159549 is 945951521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 945951521 = 23 ⋅41128327.

It is a cyclic number.

It is not a de Polignac number, because 125159549 - 2¹² = 125155453 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125159539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134699 + ... + 135624.

It is an arithmetic number, because the mean of its divisors is an integer number (31357584).

Almost surely, 2^125159549 is an apocalyptic number.

It is an amenable number.

125159549 is a deficient number, since it is larger than the sum of its proper divisors (270787).

125159549 is an equidigital number, since it uses as much as digits as its factorization.

125159549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270786.

The product of its digits is 81000, while the sum is 41.

The square root of 125159549 is about 11187.4728603023. The cubic root of 125159549 is about 500.2126415543.

The spelling of 125159549 in words is "one hundred twenty-five million, one hundred fifty-nine thousand, five hundred forty-nine".