1413220421 has 4 divisors (see below), whose sum is σ = 1496351052. Its totient is φ = 1330089792.

The previous prime is 1413220363. The next prime is 1413220427. The reversal of 1413220421 is 1240223141.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1240223141 = 1607 ⋅771763.

It can be written as a sum of positive squares in 2 ways, for example, as 480223396 + 932997025 = 21914^2 + 30545^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1413220421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1413220393 and 1413220402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1413220427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41565290 + ... + 41565323.

It is an arithmetic number, because the mean of its divisors is an integer number (374087763).

Almost surely, 2^1413220421 is an apocalyptic number.

It is an amenable number.

1413220421 is a deficient number, since it is larger than the sum of its proper divisors (83130631).

1413220421 is an equidigital number, since it uses as much as digits as its factorization.

1413220421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83130630.

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

The square root of 1413220421 is about 37592.8240625788. The cubic root of 1413220421 is about 1122.1992345021.

Adding to 1413220421 its reverse (1240223141), we get a palindrome (2653443562).

The spelling of 1413220421 in words is "one billion, four hundred thirteen million, two hundred twenty thousand, four hundred twenty-one".