102501145 has 4 divisors (see below), whose sum is σ = 123001380. Its totient is φ = 82000912.

The previous prime is 102501131. The next prime is 102501149. The reversal of 102501145 is 541105201.

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 33212169 + 69288976 = 5763^2 + 8324^2 .

It is a cyclic number.

It is not a de Polignac number, because 102501145 - 2⁷ = 102501017 is a prime.

It is a super-2 number, since 2×102501145² = 21012969452622050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102501149) 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, 10250110 + ... + 10250119.

It is an arithmetic number, because the mean of its divisors is an integer number (30750345).

Almost surely, 2^102501145 is an apocalyptic number.

It is an amenable number.

102501145 is a deficient number, since it is larger than the sum of its proper divisors (20500235).

102501145 is an equidigital number, since it uses as much as digits as its factorization.

102501145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20500234.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 102501145 is about 10124.2849130198. The cubic root of 102501145 is about 467.9968237664.

Adding to 102501145 its reverse (541105201), we get a palindrome (643606346).

The spelling of 102501145 in words is "one hundred two million, five hundred one thousand, one hundred forty-five".