1020403005 has 8 divisors (see below), whose sum is σ = 1632644832. Its totient is φ = 544214928.

The previous prime is 1020403001. The next prime is 1020403009. The reversal of 1020403005 is 5003040201.

It is an interprime number because it is at equal distance from previous prime (1020403001) and next prime (1020403009).

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

It is not a de Polignac number, because 1020403005 - 2² = 1020403001 is a prime.

It is a super-2 number, since 2×1020403005² = 2082444585226060050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 68026867 = 1020403005 / (1 + 0 + 2 + 0 + 4 + 0 + 3 + 0 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020403001) 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 7 ways as a sum of consecutive naturals, for example, 34013419 + ... + 34013448.

It is an arithmetic number, because the mean of its divisors is an integer number (204080604).

Almost surely, 2^1020403005 is an apocalyptic number.

1020403005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020403005 is a deficient number, since it is larger than the sum of its proper divisors (612241827).

1020403005 is an equidigital number, since it uses as much as digits as its factorization.

1020403005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68026875.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1020403005 is about 31943.7475102719. The cubic root of 1020403005 is about 1006.7552653017.

Adding to 1020403005 its reverse (5003040201), we get a palindrome (6023443206).

The spelling of 1020403005 in words is "one billion, twenty million, four hundred three thousand, five".