125604649 has 8 divisors (see below), whose sum is σ = 132583040. Its totient is φ = 118663056.

The previous prime is 125604629. The next prime is 125604671. The reversal of 125604649 is 946406521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125604649 - 2⁹ = 125604137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125604629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2034 + ... + 15979.

It is an arithmetic number, because the mean of its divisors is an integer number (16572880).

Almost surely, 2^125604649 is an apocalyptic number.

125604649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

125604649 is a deficient number, since it is larger than the sum of its proper divisors (6978391).

125604649 is a wasteful number, since it uses less digits than its factorization.

125604649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18399.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 125604649 is about 11207.3479913849. The cubic root of 125604649 is about 500.8049022362.

It can be divided in two parts, 125604 and 649, that added together give a triangular number (126253 = T₅₀₂).

The spelling of 125604649 in words is "one hundred twenty-five million, six hundred four thousand, six hundred forty-nine".