2273921 has 4 divisors (see below), whose sum is σ = 2448852. Its totient is φ = 2098992.

The previous prime is 2273911. The next prime is 2273923. The reversal of 2273921 is 1293722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 698896 + 1575025 = 836^2 + 1255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2273921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2273923) 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, 87446 + ... + 87471.

It is an arithmetic number, because the mean of its divisors is an integer number (612213).

2^2273921 is an apocalyptic number.

It is an amenable number.

2273921 is a deficient number, since it is larger than the sum of its proper divisors (174931).

2273921 is a wasteful number, since it uses less digits than its factorization.

2273921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174930.

The product of its digits is 1512, while the sum is 26.

The square root of 2273921 is about 1507.9525854615. The cubic root of 2273921 is about 131.4998096447.

The spelling of 2273921 in words is "two million, two hundred seventy-three thousand, nine hundred twenty-one".