1601025001 has 2 divisors, whose sum is σ = 1601025002. Its totient is φ = 1601025000.

The previous prime is 1601024993. The next prime is 1601025017. The reversal of 1601025001 is 1005201061.

It is a happy number.

It is an a-pointer prime, because the next prime (1601025017) can be obtained adding 1601025001 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 826850025 + 774174976 = 28755^2 + 27824^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601025001 - 2³ = 1601024993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1601025071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800512500 + 800512501.

It is an arithmetic number, because the mean of its divisors is an integer number (800512501).

Almost surely, 2^1601025001 is an apocalyptic number.

It is an amenable number.

1601025001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601025001 is an equidigital number, since it uses as much as digits as its factorization.

1601025001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1601025001 is about 40012.8104611511. The cubic root of 1601025001 is about 1169.8568020620.

Adding to 1601025001 its reverse (1005201061), we get a palindrome (2606226062).

The spelling of 1601025001 in words is "one billion, six hundred one million, twenty-five thousand, one".