100420140 has 24 divisors (see below), whose sum is σ = 281176560. Its totient is φ = 26778688.

The previous prime is 100420097. The next prime is 100420141. The reversal of 100420140 is 41024001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (100420141) 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, 836775 + ... + 836894.

It is an arithmetic number, because the mean of its divisors is an integer number (11715690).

Almost surely, 2^100420140 is an apocalyptic number.

100420140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100420140 is an abundant number, since it is smaller than the sum of its proper divisors (180756420).

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

100420140 is a wasteful number, since it uses less digits than its factorization.

100420140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673681 (or 1673679 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 100420140 is about 10020.9849815275. The cubic root of 100420140 is about 464.8080141664.

Adding to 100420140 its reverse (41024001), we get a palindrome (141444141).

The spelling of 100420140 in words is "one hundred million, four hundred twenty thousand, one hundred forty".