2131020 has 36 divisors (see below), whose sum is σ = 6464640. Its totient is φ = 568224.

The previous prime is 2131013. The next prime is 2131039. The reversal of 2131020 is 201312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2130993 and 2131011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5740 + ... + 6099.

2^2131020 is an apocalyptic number.

2131020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131020 is an abundant number, since it is smaller than the sum of its proper divisors (4333620).

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

2131020 is a wasteful number, since it uses less digits than its factorization.

2131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11854 (or 11849 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 2131020 is about 1459.8013563496. The cubic root of 2131020 is about 128.6853698937.

Adding to 2131020 its reverse (201312), we get a palindrome (2332332).

The spelling of 2131020 in words is "two million, one hundred thirty-one thousand, twenty".