125643061 has 4 divisors (see below), whose sum is σ = 125855532. Its totient is φ = 125430592.

The previous prime is 125643059. The next prime is 125643071. The reversal of 125643061 is 160346521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160346521 = 109 ⋅1471069.

It can be written as a sum of positive squares in 2 ways, for example, as 54982225 + 70660836 = 7415^2 + 8406^2 .

It is a cyclic number.

It is not a de Polignac number, because 125643061 - 2¹ = 125643059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125643071) 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, 105346 + ... + 106531.

It is an arithmetic number, because the mean of its divisors is an integer number (31463883).

Almost surely, 2^125643061 is an apocalyptic number.

It is an amenable number.

125643061 is a deficient number, since it is larger than the sum of its proper divisors (212471).

125643061 is an equidigital number, since it uses as much as digits as its factorization.

125643061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212470.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 125643061 is about 11209.0615575078. The cubic root of 125643061 is about 500.8559485347.

Adding to 125643061 its reverse (160346521), we get a palindrome (285989582).

It can be divided in two parts, 12564 and 3061, that added together give a 6-th power (15625 = 5⁶).

The spelling of 125643061 in words is "one hundred twenty-five million, six hundred forty-three thousand, sixty-one".