100102420 has 24 divisors (see below), whose sum is σ = 229326048. Its totient is φ = 36400800.

The previous prime is 100102397. The next prime is 100102421. The reversal of 100102420 is 24201001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 100102397 and 100102406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100102421) 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, 227286 + ... + 227725.

It is an arithmetic number, because the mean of its divisors is an integer number (9555252).

Almost surely, 2^100102420 is an apocalyptic number.

100102420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100102420 is an abundant number, since it is smaller than the sum of its proper divisors (129223628).

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

100102420 is a wasteful number, since it uses less digits than its factorization.

100102420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455031 (or 455029 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 100102420 is about 10005.1196894390. The cubic root of 100102420 is about 464.3172931353.

Adding to 100102420 its reverse (24201001), we get a palindrome (124303421).

The spelling of 100102420 in words is "one hundred million, one hundred two thousand, four hundred twenty".