102243540 has 48 divisors (see below), whose sum is σ = 327180672. Its totient is φ = 23369856.

The previous prime is 102243517. The next prime is 102243563. The reversal of 102243540 is 45342201.

It is an interprime number because it is at equal distance from previous prime (102243517) and next prime (102243563).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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, 121299 + ... + 122138.

It is an arithmetic number, because the mean of its divisors is an integer number (6816264).

Almost surely, 2^102243540 is an apocalyptic number.

102243540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102243540 is an abundant number, since it is smaller than the sum of its proper divisors (224937132).

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

102243540 is a wasteful number, since it uses less digits than its factorization.

102243540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243456 (or 243454 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 102243540 is about 10111.5547765910. The cubic root of 102243540 is about 467.6044396670.

Adding to 102243540 its reverse (45342201), we get a palindrome (147585741).

The spelling of 102243540 in words is "one hundred two million, two hundred forty-three thousand, five hundred forty".