125867131 has 4 divisors (see below), whose sum is σ = 135549232. Its totient is φ = 116185032.

The previous prime is 125867129. The next prime is 125867143. The reversal of 125867131 is 131768521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125867131 - 2¹ = 125867129 is a prime.

It is a super-2 number, since 2×125867131² = 31685069332342322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125867101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4841031 + ... + 4841056.

It is an arithmetic number, because the mean of its divisors is an integer number (33887308).

Almost surely, 2^125867131 is an apocalyptic number.

125867131 is a deficient number, since it is larger than the sum of its proper divisors (9682101).

125867131 is an equidigital number, since it uses as much as digits as its factorization.

125867131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9682100.

The product of its digits is 10080, while the sum is 34.

The square root of 125867131 is about 11219.0521435636. The cubic root of 125867131 is about 501.1535114429.

The spelling of 125867131 in words is "one hundred twenty-five million, eight hundred sixty-seven thousand, one hundred thirty-one".