102042240 has 64 divisors (see below), whose sum is σ = 325265760. Its totient is φ = 27210752.

The previous prime is 102042223. The next prime is 102042251. The reversal of 102042240 is 42240201.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24654 + ... + 28493.

Almost surely, 2^102042240 is an apocalyptic number.

102042240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102042240 is an abundant number, since it is smaller than the sum of its proper divisors (223223520).

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

102042240 is an equidigital number, since it uses as much as digits as its factorization.

102042240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53169 (or 53157 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 102042240 is about 10101.5959135178. The cubic root of 102042240 is about 467.2973603938.

Adding to 102042240 its reverse (42240201), we get a palindrome (144282441).

The spelling of 102042240 in words is "one hundred two million, forty-two thousand, two hundred forty".