100012420 has 24 divisors (see below), whose sum is σ = 212688000. Its totient is φ = 39497952.

The previous prime is 100012397. The next prime is 100012421. The reversal of 100012420 is 24210001.

100012420 = 38² + 39² + ... + 669².

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 = 100012397 and 100012406.

It is not an unprimeable number, because it can be changed into a prime (100012421) 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, 30070 + ... + 33229.

It is an arithmetic number, because the mean of its divisors is an integer number (8862000).

Almost surely, 2^100012420 is an apocalyptic number.

100012420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100012420 is an abundant number, since it is smaller than the sum of its proper divisors (112675580).

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

100012420 is a wasteful number, since it uses less digits than its factorization.

100012420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63387 (or 63385 counting only the distinct ones).

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

The square root of 100012420 is about 10000.6209807191. The cubic root of 100012420 is about 464.1780987436.

Adding to 100012420 its reverse (24210001), we get a palindrome (124222421).

It can be divided in two parts, 10001 and 2420, that added together give a palindrome (12421).

The spelling of 100012420 in words is "one hundred million, twelve thousand, four hundred twenty".