102002001 has 4 divisors (see below), whose sum is σ = 136002672. Its totient is φ = 68001332.

The previous prime is 102001993. The next prime is 102002003. The reversal of 102002001 is 100200201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100200201 = 3 ⋅33400067.

It is a cyclic number.

It is not a de Polignac number, because 102002001 - 2³ = 102001993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102002003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17000331 + ... + 17000336.

It is an arithmetic number, because the mean of its divisors is an integer number (34000668).

Almost surely, 2^102002001 is an apocalyptic number.

It is an amenable number.

102002001 is a deficient number, since it is larger than the sum of its proper divisors (34000671).

102002001 is an equidigital number, since it uses as much as digits as its factorization.

102002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34000670.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 102002001 is about 10099.6040021379. The cubic root of 102002001 is about 467.2359281521.

Adding to 102002001 its reverse (100200201), we get a palindrome (202202202).

It can be divided in two parts, 10200200 and 1, that added together give a palindrome (10200201).

The spelling of 102002001 in words is "one hundred two million, two thousand, one".