102242145 has 16 divisors (see below), whose sum is σ = 164767680. Its totient is φ = 54135744.

The previous prime is 102242143. The next prime is 102242149. The reversal of 102242145 is 541242201.

It is not a de Polignac number, because 102242145 - 2¹ = 102242143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102242143) 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, 22434 + ... + 26603.

It is an arithmetic number, because the mean of its divisors is an integer number (10297980).

Almost surely, 2^102242145 is an apocalyptic number.

102242145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102242145 is a deficient number, since it is larger than the sum of its proper divisors (62525535).

102242145 is a wasteful number, since it uses less digits than its factorization.

102242145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49184.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 102242145 is about 10111.4857958660. The cubic root of 102242145 is about 467.6023130089.

Adding to 102242145 its reverse (541242201), we get a palindrome (643484346).

The spelling of 102242145 in words is "one hundred two million, two hundred forty-two thousand, one hundred forty-five".