1424121421 has 4 divisors (see below), whose sum is σ = 1499075200. Its totient is φ = 1349167644.

The previous prime is 1424121353. The next prime is 1424121427. The reversal of 1424121421 is 1241214241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1241214241 = 10399 ⋅119359.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1424121421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1424121392 and 1424121401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1424121427) 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, 37476861 + ... + 37476898.

It is an arithmetic number, because the mean of its divisors is an integer number (374768800).

Almost surely, 2^1424121421 is an apocalyptic number.

It is an amenable number.

1424121421 is a deficient number, since it is larger than the sum of its proper divisors (74953779).

1424121421 is an equidigital number, since it uses as much as digits as its factorization.

1424121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74953778.

The product of its digits is 512, while the sum is 22.

The square root of 1424121421 is about 37737.5333189651. The cubic root of 1424121421 is about 1125.0772413797.

Adding to 1424121421 its reverse (1241214241), we get a palindrome (2665335662).

The spelling of 1424121421 in words is "one billion, four hundred twenty-four million, one hundred twenty-one thousand, four hundred twenty-one".