2135540 has 48 divisors (see below), whose sum is σ = 5189184. Its totient is φ = 729600.

The previous prime is 2135537. The next prime is 2135563. The reversal of 2135540 is 455312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3455 + ... + 4025.

It is an arithmetic number, because the mean of its divisors is an integer number (108108).

2^2135540 is an apocalyptic number.

2135540 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 2135540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2594592).

2135540 is an abundant number, since it is smaller than the sum of its proper divisors (3053644).

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

2135540 is a wasteful number, since it uses less digits than its factorization.

2135540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2135540 is about 1461.3486921334. The cubic root of 2135540 is about 128.7762883449.

The spelling of 2135540 in words is "two million, one hundred thirty-five thousand, five hundred forty".