1020403001 has 2 divisors, whose sum is σ = 1020403002. Its totient is φ = 1020403000.

The previous prime is 1020402997. The next prime is 1020403009. The reversal of 1020403001 is 1003040201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 992313001 + 28090000 = 31501^2 + 5300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020403001 - 2² = 1020402997 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020403009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510201500 + 510201501.

It is an arithmetic number, because the mean of its divisors is an integer number (510201501).

Almost surely, 2^1020403001 is an apocalyptic number.

It is an amenable number.

1020403001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020403001 is an equidigital number, since it uses as much as digits as its factorization.

1020403001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1020403001 is about 31943.7474476618. The cubic root of 1020403001 is about 1006.7552639862.

Adding to 1020403001 its reverse (1003040201), we get a palindrome (2023443202).

The spelling of 1020403001 in words is "one billion, twenty million, four hundred three thousand, one".