2574221 has 4 divisors (see below), whose sum is σ = 2772252. Its totient is φ = 2376192.

The previous prime is 2574217. The next prime is 2574223. The reversal of 2574221 is 1224752.

It is a happy number.

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 1276900 + 1297321 = 1130^2 + 1139^2 .

It is not a de Polignac number, because 2574221 - 2² = 2574217 is a prime.

It is a super-2 number, since 2×2574221² = 13253227513682, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹² + 5⁸ + 7⁵ + 4 + 2¹⁶ + 2²¹ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2574223) 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, 98996 + ... + 99021.

It is an arithmetic number, because the mean of its divisors is an integer number (693063).

2^2574221 is an apocalyptic number.

It is an amenable number.

2574221 is a deficient number, since it is larger than the sum of its proper divisors (198031).

2574221 is a wasteful number, since it uses less digits than its factorization.

2574221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198030.

The product of its digits is 1120, while the sum is 23.

The square root of 2574221 is about 1604.4379078045. The cubic root of 2574221 is about 137.0509161271.

Adding to 2574221 its reverse (1224752), we get a palindrome (3798973).

The spelling of 2574221 in words is "two million, five hundred seventy-four thousand, two hundred twenty-one".