1243414221 has 16 divisors (see below), whose sum is σ = 2006181504. Its totient is φ = 668726784.

The previous prime is 1243414219. The next prime is 1243414223. The reversal of 1243414221 is 1224143421.

It is an interprime number because it is at equal distance from previous prime (1243414219) and next prime (1243414223).

It is not a de Polignac number, because 1243414221 - 2¹ = 1243414219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243414191 and 1243414200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243414223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1741120 + ... + 1741833.

It is an arithmetic number, because the mean of its divisors is an integer number (125386344).

Almost surely, 2^1243414221 is an apocalyptic number.

It is an amenable number.

1243414221 is a deficient number, since it is larger than the sum of its proper divisors (762767283).

1243414221 is a wasteful number, since it uses less digits than its factorization.

1243414221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482980.

The product of its digits is 1536, while the sum is 24.

The square root of 1243414221 is about 35262.0790793736. The cubic root of 1243414221 is about 1075.3221954007.

Adding to 1243414221 its reverse (1224143421), we get a palindrome (2467557642).

The spelling of 1243414221 in words is "one billion, two hundred forty-three million, four hundred fourteen thousand, two hundred twenty-one".