2748921 has 16 divisors (see below), whose sum is σ = 4214784. Its totient is φ = 1561104.

The previous prime is 2748919. The next prime is 2748923. The reversal of 2748921 is 1298472.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2748919) and next prime (2748923).

It is not a de Polignac number, because 2748921 - 2¹ = 2748919 is a prime.

2748921 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2748923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4390 + ... + 4976.

It is an arithmetic number, because the mean of its divisors is an integer number (263424).

2^2748921 is an apocalyptic number.

2748921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2748921 is a deficient number, since it is larger than the sum of its proper divisors (1465863).

2748921 is a wasteful number, since it uses less digits than its factorization.

2748921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its digits is 8064, while the sum is 33.

The square root of 2748921 is about 1657.9870325187. The cubic root of 2748921 is about 140.0836404967.

The spelling of 2748921 in words is "two million, seven hundred forty-eight thousand, nine hundred twenty-one".