125644003 has 4 divisors (see below), whose sum is σ = 126939400. Its totient is φ = 124348608.

The previous prime is 125643977. The next prime is 125644027. The reversal of 125644003 is 300446521.

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 125644003 - 2²¹ = 123546851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125644033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647553 + ... + 647746.

It is an arithmetic number, because the mean of its divisors is an integer number (31734850).

Almost surely, 2^125644003 is an apocalyptic number.

125644003 is a deficient number, since it is larger than the sum of its proper divisors (1295397).

125644003 is an equidigital number, since it uses as much as digits as its factorization.

125644003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295396.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 125644003 is about 11209.1035770038. The cubic root of 125644003 is about 500.8572002423.

The spelling of 125644003 in words is "one hundred twenty-five million, six hundred forty-four thousand, three".