102123140 has 24 divisors (see below), whose sum is σ = 245095872. Its totient is φ = 35013600.

The previous prime is 102123137. The next prime is 102123143. The reversal of 102123140 is 41321201.

It is an interprime number because it is at equal distance from previous prime (102123137) and next prime (102123143).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (102123143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364586 + ... + 364865.

It is an arithmetic number, because the mean of its divisors is an integer number (10212328).

Almost surely, 2^102123140 is an apocalyptic number.

102123140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102123140 is an abundant number, since it is smaller than the sum of its proper divisors (142972732).

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

102123140 is a wasteful number, since it uses less digits than its factorization.

102123140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729467 (or 729465 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 102123140 is about 10105.5994379354. The cubic root of 102123140 is about 467.4208202810.

Adding to 102123140 its reverse (41321201), we get a palindrome (143444341).

The spelling of 102123140 in words is "one hundred two million, one hundred twenty-three thousand, one hundred forty".