2101240 has 32 divisors (see below), whose sum is σ = 4775760. Its totient is φ = 832000.

The previous prime is 2101237. The next prime is 2101243. The reversal of 2101240 is 421012.

It is an interprime number because it is at equal distance from previous prime (2101237) and next prime (2101243).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101243) 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, 5040 + ... + 5440.

2^2101240 is an apocalyptic number.

2101240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101240 is an abundant number, since it is smaller than the sum of its proper divisors (2674520).

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

2101240 is a wasteful number, since it uses less digits than its factorization.

2101240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 539 counting only the distinct ones).

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

The square root of 2101240 is about 1449.5654521269. The cubic root of 2101240 is about 128.0831165896.

Adding to 2101240 its reverse (421012), we get a palindrome (2522252).

The spelling of 2101240 in words is "two million, one hundred one thousand, two hundred forty".