125544613 has 4 divisors (see below), whose sum is σ = 125946028. Its totient is φ = 125143200.

The previous prime is 125544611. The next prime is 125544641. The reversal of 125544613 is 316445521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 316445521 = 7 ⋅45206503.

It can be written as a sum of positive squares in 2 ways, for example, as 3265249 + 122279364 = 1807^2 + 11058^2 .

It is a cyclic number.

It is not a de Polignac number, because 125544613 - 2¹ = 125544611 is a prime.

It is a super-2 number, since 2×125544613² = 31522899706639538, which contains 22 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 (125544611) 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, 200238 + ... + 200863.

It is an arithmetic number, because the mean of its divisors is an integer number (31486507).

Almost surely, 2^125544613 is an apocalyptic number.

It is an amenable number.

125544613 is a deficient number, since it is larger than the sum of its proper divisors (401415).

125544613 is an equidigital number, since it uses as much as digits as its factorization.

125544613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401414.

The product of its digits is 14400, while the sum is 31.

The square root of 125544613 is about 11204.6692499154. The cubic root of 125544613 is about 500.7250986223.

The spelling of 125544613 in words is "one hundred twenty-five million, five hundred forty-four thousand, six hundred thirteen".