2721942 has 48 divisors (see below), whose sum is σ = 6248112. Its totient is φ = 855360.

The previous prime is 2721913. The next prime is 2721947. The reversal of 2721942 is 2491272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40593 + ... + 40659.

It is an arithmetic number, because the mean of its divisors is an integer number (130169).

2^2721942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2721942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3124056).

2721942 is an abundant number, since it is smaller than the sum of its proper divisors (3526170).

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

2721942 is a wasteful number, since it uses less digits than its factorization.

2721942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 170 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 2721942 is about 1649.8309004259. The cubic root of 2721942 is about 139.6238542390.

It can be divided in two parts, 27219 and 42, that added together give a triangular number (27261 = T₂₃₃).

The spelling of 2721942 in words is "two million, seven hundred twenty-one thousand, nine hundred forty-two".