125135261 has 8 divisors (see below), whose sum is σ = 130442400. Its totient is φ = 119894320.

The previous prime is 125135243. The next prime is 125135267. The reversal of 125135261 is 162531521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125135261 - 2¹⁸ = 124873117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125135261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125135267) 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 7 ways as a sum of consecutive naturals, for example, 12671 + ... + 20268.

It is an arithmetic number, because the mean of its divisors is an integer number (16305300).

Almost surely, 2^125135261 is an apocalyptic number.

It is an amenable number.

125135261 is a deficient number, since it is larger than the sum of its proper divisors (5307139).

125135261 is a wasteful number, since it uses less digits than its factorization.

125135261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33099.

The product of its digits is 1800, while the sum is 26.

The square root of 125135261 is about 11186.3873077951. The cubic root of 125135261 is about 500.1802829883.

Adding to 125135261 its reverse (162531521), we get a palindrome (287666782).

The spelling of 125135261 in words is "one hundred twenty-five million, one hundred thirty-five thousand, two hundred sixty-one".