2061520 has 40 divisors (see below), whose sum is σ = 4872456. Its totient is φ = 811008.

The previous prime is 2061503. The next prime is 2061533. The reversal of 2061520 is 251602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 190096 + 1871424 = 436^2 + 1368^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 2061494 and 2061503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5664 + ... + 6016.

2^2061520 is an apocalyptic number.

2061520 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 2061520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2436228).

2061520 is an abundant number, since it is smaller than the sum of its proper divisors (2810936).

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

2061520 is a wasteful number, since it uses less digits than its factorization.

2061520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2061520 is about 1435.7994288897. The cubic root of 2061520 is about 127.2709201970.

The spelling of 2061520 in words is "two million, sixty-one thousand, five hundred twenty".