2091544 has 64 divisors (see below), whose sum is σ = 5140800. Its totient is φ = 778752.

The previous prime is 2091521. The next prime is 2091553. The reversal of 2091544 is 4451902.

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, 123024 + ... + 123040.

It is an arithmetic number, because the mean of its divisors is an integer number (80325).

2^2091544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2091544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2570400).

2091544 is an abundant number, since it is smaller than the sum of its proper divisors (3049256).

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

2091544 is a wasteful number, since it uses less digits than its factorization.

2091544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2091544 is about 1446.2171344580. The cubic root of 2091544 is about 127.8858030959.

The spelling of 2091544 in words is "two million, ninety-one thousand, five hundred forty-four".