2101420 has 12 divisors (see below), whose sum is σ = 4413024. Its totient is φ = 840560.

The previous prime is 2101391. The next prime is 2101423. The reversal of 2101420 is 241012.

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 = 2101397 and 2101406.

It is not an unprimeable number, because it can be changed into a prime (2101423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52516 + ... + 52555.

It is an arithmetic number, because the mean of its divisors is an integer number (367752).

2^2101420 is an apocalyptic number.

2101420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101420 is an abundant number, since it is smaller than the sum of its proper divisors (2311604).

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

2101420 is a wasteful number, since it uses less digits than its factorization.

2101420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105080 (or 105078 counting only the distinct ones).

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

The square root of 2101420 is about 1449.6275383698. The cubic root of 2101420 is about 128.0867738432.

Adding to 2101420 its reverse (241012), we get a palindrome (2342432).

The spelling of 2101420 in words is "two million, one hundred one thousand, four hundred twenty".