1000120003 has 8 divisors (see below), whose sum is σ = 1021849920. Its totient is φ = 978408960.

The previous prime is 1000120001. The next prime is 1000120007. The reversal of 1000120003 is 3000210001.

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

It is a cyclic number.

It is not a de Polignac number, because 1000120003 - 2¹ = 1000120001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000120001) 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, 176803 + ... + 182371.

It is an arithmetic number, because the mean of its divisors is an integer number (127731240).

Almost surely, 2^1000120003 is an apocalyptic number.

1000120003 is a deficient number, since it is larger than the sum of its proper divisors (21729917).

1000120003 is an equidigital number, since it uses as much as digits as its factorization.

1000120003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9437.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 1000120003 is about 31624.6739587936. The cubic root of 1000120003 is about 1000.0399994000.

Adding to 1000120003 its reverse (3000210001), we get a palindrome (4000330004).

It can be divided in two parts, 10001 and 20003, that multiplied together give a triangular number (200050003 = T₂₀₀₀₂).

The spelling of 1000120003 in words is "one billion, one hundred twenty thousand, three".