102245420 has 12 divisors (see below), whose sum is σ = 214715424. Its totient is φ = 40898160.

The previous prime is 102245411. The next prime is 102245449. The reversal of 102245420 is 24542201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 5112271 = 102245420 / (1 + 0 + 2 + 2 + 4 + 5 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 102245392 and 102245401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2556116 + ... + 2556155.

It is an arithmetic number, because the mean of its divisors is an integer number (17892952).

Almost surely, 2^102245420 is an apocalyptic number.

102245420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102245420 is an abundant number, since it is smaller than the sum of its proper divisors (112470004).

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

102245420 is a wasteful number, since it uses less digits than its factorization.

102245420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112280 (or 5112278 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 102245420 is about 10111.6477391175. The cubic root of 102245420 is about 467.6073056702.

Adding to 102245420 its reverse (24542201), we get a palindrome (126787621).

The spelling of 102245420 in words is "one hundred two million, two hundred forty-five thousand, four hundred twenty".