102520001 has 4 divisors (see below), whose sum is σ = 102569604. Its totient is φ = 102470400.

The previous prime is 102519931. The next prime is 102520021. The reversal of 102520001 is 100025201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51825601 + 50694400 = 7199^2 + 7120^2 .

It is a cyclic number.

It is not a de Polignac number, because 102520001 - 2²² = 98325697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102520021) 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 3 ways as a sum of consecutive naturals, for example, 21560 + ... + 25881.

It is an arithmetic number, because the mean of its divisors is an integer number (25642401).

Almost surely, 2^102520001 is an apocalyptic number.

It is an amenable number.

102520001 is a deficient number, since it is larger than the sum of its proper divisors (49603).

102520001 is an equidigital number, since it uses as much as digits as its factorization.

102520001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49602.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 102520001 is about 10125.2160964594. The cubic root of 102520001 is about 468.0255194037.

Adding to 102520001 its reverse (100025201), we get a palindrome (202545202).

The spelling of 102520001 in words is "one hundred two million, five hundred twenty thousand, one".