2407221 has 6 divisors (see below), whose sum is σ = 3477110. Its totient is φ = 1604808.

The previous prime is 2407219. The next prime is 2407231. The reversal of 2407221 is 1227042.

It can be written as a sum of positive squares in only one way, i.e., 1726596 + 680625 = 1314^2 + 825^2 .

It is not a de Polignac number, because 2407221 - 2¹ = 2407219 is a prime.

It is a Duffinian number.

2407221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2407194 and 2407203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2407201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133726 + ... + 133743.

2^2407221 is an apocalyptic number.

It is an amenable number.

2407221 is a deficient number, since it is larger than the sum of its proper divisors (1069889).

2407221 is a wasteful number, since it uses less digits than its factorization.

2407221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267475 (or 267472 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 2407221 is about 1551.5221558199. The cubic root of 2407221 is about 134.0207326649.

It can be divided in two parts, 2407 and 221, that added together give a triangular number (2628 = T₇₂).

The spelling of 2407221 in words is "two million, four hundred seven thousand, two hundred twenty-one".