125712261 has 12 divisors (see below), whose sum is σ = 181683840. Its totient is φ = 83762280.

The previous prime is 125712259. The next prime is 125712269. The reversal of 125712261 is 162217521.

125712261 is a `hidden beast` number, since 12 + 571 + 22 + 61 = 666.

It is not a de Polignac number, because 125712261 - 2¹ = 125712259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125712269) 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 11 ways as a sum of consecutive naturals, for example, 24780 + ... + 29418.

It is an arithmetic number, because the mean of its divisors is an integer number (15140320).

Almost surely, 2^125712261 is an apocalyptic number.

It is an amenable number.

125712261 is a deficient number, since it is larger than the sum of its proper divisors (55971579).

125712261 is a wasteful number, since it uses less digits than its factorization.

125712261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7656 (or 7653 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 125712261 is about 11212.1479208937. The cubic root of 125712261 is about 500.9478832325.

Adding to 125712261 its reverse (162217521), we get a palindrome (287929782).

The spelling of 125712261 in words is "one hundred twenty-five million, seven hundred twelve thousand, two hundred sixty-one".