102405540 has 48 divisors (see below), whose sum is σ = 292154688. Its totient is φ = 26792064.

The previous prime is 102405539. The next prime is 102405553. The reversal of 102405540 is 45504201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12922 + ... + 19281.

It is an arithmetic number, because the mean of its divisors is an integer number (6086556).

Almost surely, 2^102405540 is an apocalyptic number.

102405540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102405540 is an abundant number, since it is smaller than the sum of its proper divisors (189749148).

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

102405540 is a wasteful number, since it uses less digits than its factorization.

102405540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32268 (or 32266 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 102405540 is about 10119.5622434965. The cubic root of 102405540 is about 467.8512749714.

Adding to 102405540 its reverse (45504201), we get a palindrome (147909741).

The spelling of 102405540 in words is "one hundred two million, four hundred five thousand, five hundred forty".