15670001 has 2 divisors, whose sum is σ = 15670002. Its totient is φ = 15670000.

The previous prime is 15669989. The next prime is 15670019. The reversal of 15670001 is 10007651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15366400 + 303601 = 3920^2 + 551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15670001 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15670021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7835000 + 7835001.

It is an arithmetic number, because the mean of its divisors is an integer number (7835001).

Almost surely, 2^15670001 is an apocalyptic number.

It is an amenable number.

15670001 is a deficient number, since it is larger than the sum of its proper divisors (1).

15670001 is an equidigital number, since it uses as much as digits as its factorization.

15670001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 15670001 is about 3958.5352088872. The cubic root of 15670001 is about 250.2397752911.

Adding to 15670001 its reverse (10007651), we get a palindrome (25677652).

The spelling of 15670001 in words is "fifteen million, six hundred seventy thousand, one".