125699861 has 16 divisors (see below), whose sum is σ = 145776384. Its totient is φ = 106164864.

The previous prime is 125699837. The next prime is 125699863. The reversal of 125699861 is 168996521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 125699861 - 2⁶ = 125699797 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 (125699863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225395 + ... + 225951.

It is an arithmetic number, because the mean of its divisors is an integer number (9111024).

Almost surely, 2^125699861 is an apocalyptic number.

It is an amenable number.

125699861 is a deficient number, since it is larger than the sum of its proper divisors (20076523).

125699861 is a wasteful number, since it uses less digits than its factorization.

125699861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its digits is 233280, while the sum is 47.

The square root of 125699861 is about 11211.5949356013. The cubic root of 125699861 is about 500.9314118665.

The spelling of 125699861 in words is "one hundred twenty-five million, six hundred ninety-nine thousand, eight hundred sixty-one".