1424140021 has 4 divisors (see below), whose sum is σ = 1424267712. Its totient is φ = 1424012332.

The previous prime is 1424140019. The next prime is 1424140087. The reversal of 1424140021 is 1200414241.

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: 1200414241 = 13 ⋅92339557.

It is a cyclic number.

It is not a de Polignac number, because 1424140021 - 2¹ = 1424140019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1424140001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45325 + ... + 70018.

It is an arithmetic number, because the mean of its divisors is an integer number (356066928).

Almost surely, 2^1424140021 is an apocalyptic number.

It is an amenable number.

1424140021 is a deficient number, since it is larger than the sum of its proper divisors (127691).

1424140021 is a wasteful number, since it uses less digits than its factorization.

1424140021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127690.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1424140021 is about 37737.7797571611. The cubic root of 1424140021 is about 1125.0821394512.

Adding to 1424140021 its reverse (1200414241), we get a palindrome (2624554262).

The spelling of 1424140021 in words is "one billion, four hundred twenty-four million, one hundred forty thousand, twenty-one".