2091420 has 60 divisors (see below), whose sum is σ = 6565944. Its totient is φ = 557280.

The previous prime is 2091409. The next prime is 2091421. The reversal of 2091420 is 241902.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2091393 and 2091402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091421) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 975 + ... + 2265.

2^2091420 is an apocalyptic number.

2091420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2091420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3282972).

2091420 is an abundant number, since it is smaller than the sum of its proper divisors (4474524).

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

2091420 is a wasteful number, since it uses less digits than its factorization.

2091420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2091420 is about 1446.1742633583. The cubic root of 2091420 is about 127.8832757520.

The spelling of 2091420 in words is "two million, ninety-one thousand, four hundred twenty".