2101272 has 16 divisors (see below), whose sum is σ = 5253240. Its totient is φ = 700416.

The previous prime is 2101261. The next prime is 2101277. The reversal of 2101272 is 2721012.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43753 + ... + 43800.

2^2101272 is an apocalyptic number.

It is an amenable number.

2101272 is an abundant number, since it is smaller than the sum of its proper divisors (3151968).

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

2101272 is a wasteful number, since it uses less digits than its factorization.

2101272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87562 (or 87558 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 2101272 is about 1449.5764898756. The cubic root of 2101272 is about 128.0837667833.

Adding to 2101272 its reverse (2721012), we get a palindrome (4822284).

The spelling of 2101272 in words is "two million, one hundred one thousand, two hundred seventy-two".