102143145 has 48 divisors (see below), whose sum is σ = 185879232. Its totient is φ = 47606400.

The previous prime is 102143141. The next prime is 102143147. The reversal of 102143145 is 541341201.

It is not a de Polignac number, because 102143145 - 2² = 102143141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102143141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69670 + ... + 71120.

It is an arithmetic number, because the mean of its divisors is an integer number (3872484).

Almost surely, 2^102143145 is an apocalyptic number.

102143145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102143145 is a deficient number, since it is larger than the sum of its proper divisors (83736087).

102143145 is a wasteful number, since it uses less digits than its factorization.

102143145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 102143145 is about 10106.5891872580. The cubic root of 102143145 is about 467.4513394595.

Adding to 102143145 its reverse (541341201), we get a palindrome (643484346).

The spelling of 102143145 in words is "one hundred two million, one hundred forty-three thousand, one hundred forty-five".