2101544 has 8 divisors (see below), whose sum is σ = 3940410. Its totient is φ = 1050768.

The previous prime is 2101531. The next prime is 2101549. The reversal of 2101544 is 4451012.

It can be written as a sum of positive squares in only one way, i.e., 2044900 + 56644 = 1430^2 + 238^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2101549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131339 + ... + 131354.

2^2101544 is an apocalyptic number.

It is an amenable number.

2101544 is a deficient number, since it is larger than the sum of its proper divisors (1838866).

2101544 is a wasteful number, since it uses less digits than its factorization.

2101544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262699 (or 262695 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 2101544 is about 1449.6703073458. The cubic root of 2101544 is about 128.0892931631.

Adding to 2101544 its reverse (4451012), we get a palindrome (6552556).

The spelling of 2101544 in words is "two million, one hundred one thousand, five hundred forty-four".