1409420221 has 12 divisors (see below), whose sum is σ = 1550760316. Its totient is φ = 1279998720.

The previous prime is 1409420203. The next prime is 1409420227. The reversal of 1409420221 is 1220249041.

It can be written as a sum of positive squares in 2 ways, for example, as 783720025 + 625700196 = 27995^2 + 25014^2 .

It is not a de Polignac number, because 1409420221 - 2⁹ = 1409419709 is a prime.

It is a super-3 number, since 3×1409420221³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1409420227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126925 + ... + 137581.

Almost surely, 2^1409420221 is an apocalyptic number.

1409420221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1409420221 is a deficient number, since it is larger than the sum of its proper divisors (141340095).

1409420221 is a wasteful number, since it uses less digits than its factorization.

1409420221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11772 (or 11761 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1409420221 is about 37542.2458172124. The cubic root of 1409420221 is about 1121.1924536477.

Adding to 1409420221 its reverse (1220249041), we get a palindrome (2629669262).

The spelling of 1409420221 in words is "one billion, four hundred nine million, four hundred twenty thousand, two hundred twenty-one".