2742221 has 4 divisors (see below), whose sum is σ = 2861472. Its totient is φ = 2622972.

The previous prime is 2742217. The next prime is 2742227. The reversal of 2742221 is 1222472.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2742221 - 2² = 2742217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2742193 and 2742202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2742227) 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, 59591 + ... + 59636.

It is an arithmetic number, because the mean of its divisors is an integer number (715368).

2^2742221 is an apocalyptic number.

It is an amenable number.

2742221 is a deficient number, since it is larger than the sum of its proper divisors (119251).

2742221 is a wasteful number, since it uses less digits than its factorization.

2742221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119250.

The product of its digits is 448, while the sum is 20.

The square root of 2742221 is about 1655.9652774138. The cubic root of 2742221 is about 139.9697383572.

Adding to 2742221 its reverse (1222472), we get a palindrome (3964693).

The spelling of 2742221 in words is "two million, seven hundred forty-two thousand, two hundred twenty-one".