1403241221 has 4 divisors (see below), whose sum is σ = 1408235244. Its totient is φ = 1398247200.

The previous prime is 1403241193. The next prime is 1403241223. The reversal of 1403241221 is 1221423041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1221423041 = 43 ⋅28405187.

It can be written as a sum of positive squares in 2 ways, for example, as 991557121 + 411684100 = 31489^2 + 20290^2 .

It is a cyclic number.

It is not a de Polignac number, because 1403241221 - 2⁶ = 1403241157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1403241193 and 1403241202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403241223) 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, 2496590 + ... + 2497151.

It is an arithmetic number, because the mean of its divisors is an integer number (352058811).

Almost surely, 2^1403241221 is an apocalyptic number.

It is an amenable number.

1403241221 is a deficient number, since it is larger than the sum of its proper divisors (4994023).

1403241221 is an equidigital number, since it uses as much as digits as its factorization.

1403241221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4994022.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1403241221 is about 37459.8614653071. The cubic root of 1403241221 is about 1119.5515905324.

Adding to 1403241221 its reverse (1221423041), we get a palindrome (2624664262).

The spelling of 1403241221 in words is "one billion, four hundred three million, two hundred forty-one thousand, two hundred twenty-one".