125864869 has 4 divisors (see below), whose sum is σ = 135546796. Its totient is φ = 116182944.

The previous prime is 125864857. The next prime is 125864897. The reversal of 125864869 is 968468521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42380100 + 83484769 = 6510^2 + 9137^2 .

It is a cyclic number.

It is not a de Polignac number, because 125864869 - 2¹³ = 125856677 is a prime.

It is a super-2 number, since 2×125864869² = 31683930496774322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125864839) 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, 4840944 + ... + 4840969.

It is an arithmetic number, because the mean of its divisors is an integer number (33886699).

Almost surely, 2^125864869 is an apocalyptic number.

It is an amenable number.

125864869 is a deficient number, since it is larger than the sum of its proper divisors (9681927).

125864869 is an equidigital number, since it uses as much as digits as its factorization.

125864869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9681926.

The product of its digits is 829440, while the sum is 49.

The square root of 125864869 is about 11218.9513324553. The cubic root of 125864869 is about 501.1505092929.

The spelling of 125864869 in words is "one hundred twenty-five million, eight hundred sixty-four thousand, eight hundred sixty-nine".