1002415221 has 6 divisors (see below), whose sum is σ = 1447933110. Its totient is φ = 668276808.

The previous prime is 1002415151. The next prime is 1002415223. The reversal of 1002415221 is 1225142001.

1002415221 is a `hidden beast` number, since 100 + 2 + 41 + 522 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 965034225 + 37380996 = 31065^2 + 6114^2 .

It is not a de Polignac number, because 1002415221 - 2¹⁹ = 1001890933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002415194 and 1002415203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002415223) 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, 55689726 + ... + 55689743.

It is an arithmetic number, because the mean of its divisors is an integer number (241322185).

Almost surely, 2^1002415221 is an apocalyptic number.

It is an amenable number.

1002415221 is a deficient number, since it is larger than the sum of its proper divisors (445517889).

1002415221 is a wasteful number, since it uses less digits than its factorization.

1002415221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111379475 (or 111379472 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1002415221 is about 31660.9415684373. The cubic root of 1002415221 is about 1000.8044263913.

Adding to 1002415221 its reverse (1225142001), we get a palindrome (2227557222).

The spelling of 1002415221 in words is "one billion, two million, four hundred fifteen thousand, two hundred twenty-one".