102720001 has 16 divisors (see below), whose sum is σ = 117417600. Its totient is φ = 89275648.

The previous prime is 102719999. The next prime is 102720017. The reversal of 102720001 is 100027201.

It is a cyclic number.

It is not a de Polignac number, because 102720001 - 2¹ = 102719999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102720041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6810 + ... + 15868.

It is an arithmetic number, because the mean of its divisors is an integer number (7338600).

Almost surely, 2^102720001 is an apocalyptic number.

It is an amenable number.

102720001 is a deficient number, since it is larger than the sum of its proper divisors (14697599).

102720001 is a wasteful number, since it uses less digits than its factorization.

102720001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9128.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 102720001 is about 10135.0876167895. The cubic root of 102720001 is about 468.3296691610.

Adding to 102720001 its reverse (100027201), we get a palindrome (202747202).

The spelling of 102720001 in words is "one hundred two million, seven hundred twenty thousand, one".