102023145 has 120 divisors (see below), whose sum is σ = 218993544. Its totient is φ = 45287424.

The previous prime is 102023143. The next prime is 102023149. The reversal of 102023145 is 541320201.

It can be written as a sum of positive squares in 4 ways, for example, as 16257024 + 85766121 = 4032^2 + 9261^2 .

It is not a de Polignac number, because 102023145 - 2¹ = 102023143 is a prime.

Together with 116970399 it forms an amicable pair .

It is not an unprimeable number, because it can be changed into a prime (102023143) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1051737 + ... + 1051833.

Almost surely, 2^102023145 is an apocalyptic number.

102023145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102023145 is an abundant number, since it is smaller than the sum of its proper divisors (116970399).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102023145 is an equidigital number, since it uses as much as digits as its factorization.

102023145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 102023145 is about 10100.6507216119. The cubic root of 102023145 is about 467.2682103747.

Adding to 102023145 its reverse (541320201), we get a palindrome (643343346).

The spelling of 102023145 in words is "one hundred two million, twenty-three thousand, one hundred forty-five".