1001245403 has 2 divisors, whose sum is σ = 1001245404. Its totient is φ = 1001245402.

The previous prime is 1001245397. The next prime is 1001245477. The reversal of 1001245403 is 3045421001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001245403 - 2¹⁶ = 1001179867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001245103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500622701 + 500622702.

It is an arithmetic number, because the mean of its divisors is an integer number (500622702).

Almost surely, 2^1001245403 is an apocalyptic number.

1001245403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001245403 is an equidigital number, since it uses as much as digits as its factorization.

1001245403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1001245403 is about 31642.4620249436. The cubic root of 1001245403 is about 1000.4149621160.

Adding to 1001245403 its reverse (3045421001), we get a palindrome (4046666404).

The spelling of 1001245403 in words is "one billion, one million, two hundred forty-five thousand, four hundred three".