101002145 has 4 divisors (see below), whose sum is σ = 121202580. Its totient is φ = 80801712.

The previous prime is 101002129. The next prime is 101002169. The reversal of 101002145 is 541200101.

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 42081169 + 58920976 = 6487^2 + 7676^2 .

It is a cyclic number.

It is not a de Polignac number, because 101002145 - 2⁴ = 101002129 is a prime.

It is a Curzon number.

It is an unprimeable number.

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, 10100210 + ... + 10100219.

It is an arithmetic number, because the mean of its divisors is an integer number (30300645).

Almost surely, 2^101002145 is an apocalyptic number.

It is an amenable number.

101002145 is a deficient number, since it is larger than the sum of its proper divisors (20200435).

101002145 is an equidigital number, since it uses as much as digits as its factorization.

101002145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20200434.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 101002145 is about 10049.9823382929. The cubic root of 101002145 is about 465.7042475509.

Adding to 101002145 its reverse (541200101), we get a palindrome (642202246).

The spelling of 101002145 in words is "one hundred one million, two thousand, one hundred forty-five".