125785949 has 4 divisors (see below), whose sum is σ = 126630300. Its totient is φ = 124941600.

The previous prime is 125785937. The next prime is 125785951. The reversal of 125785949 is 949587521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949587521 = 673 ⋅1410977.

It can be written as a sum of positive squares in 2 ways, for example, as 60062500 + 65723449 = 7750^2 + 8107^2 .

It is a cyclic number.

It is not a de Polignac number, because 125785949 - 2²⁰ = 124737373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125785897 and 125785906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125781949) 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, 421952 + ... + 422249.

It is an arithmetic number, because the mean of its divisors is an integer number (31657575).

Almost surely, 2^125785949 is an apocalyptic number.

It is an amenable number.

125785949 is a deficient number, since it is larger than the sum of its proper divisors (844351).

125785949 is an equidigital number, since it uses as much as digits as its factorization.

125785949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844350.

The product of its digits is 907200, while the sum is 50.

The square root of 125785949 is about 11215.4335181481. The cubic root of 125785949 is about 501.0457433170.

The spelling of 125785949 in words is "one hundred twenty-five million, seven hundred eighty-five thousand, nine hundred forty-nine".