1003000402 has 4 divisors (see below), whose sum is σ = 1504500606. Its totient is φ = 501500200.

The previous prime is 1003000373. The next prime is 1003000423. The reversal of 1003000402 is 2040003001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2040003001 = 19 ⋅107368579.

It can be written as a sum of positive squares in only one way, i.e., 959822361 + 43178041 = 30981^2 + 6571^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250750099 + ... + 250750102.

Almost surely, 2^1003000402 is an apocalyptic number.

1003000402 is a deficient number, since it is larger than the sum of its proper divisors (501500204).

1003000402 is an equidigital number, since it uses as much as digits as its factorization.

1003000402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501500203.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 1003000402 is about 31670.1815908908. The cubic root of 1003000402 is about 1000.9991353960. Note that the first 3 decimals are identical.

Adding to 1003000402 its reverse (2040003001), we get a palindrome (3043003403).

The spelling of 1003000402 in words is "one billion, three million, four hundred two", and thus it is an aban number.