1421124409 has 4 divisors (see below), whose sum is σ = 1429634304. Its totient is φ = 1412614516.

The previous prime is 1421124389. The next prime is 1421124461. The reversal of 1421124409 is 9044211241.

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: 9044211241 = 13 ⋅695708557.

It is a cyclic number.

It is not a de Polignac number, because 1421124409 - 2¹³ = 1421116217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421134409) 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, 4254697 + ... + 4255030.

It is an arithmetic number, because the mean of its divisors is an integer number (357408576).

Almost surely, 2^1421124409 is an apocalyptic number.

It is an amenable number.

1421124409 is a deficient number, since it is larger than the sum of its proper divisors (8509895).

1421124409 is an equidigital number, since it uses as much as digits as its factorization.

1421124409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8509894.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1421124409 is about 37697.8037689200. The cubic root of 1421124409 is about 1124.2874589826.

The spelling of 1421124409 in words is "one billion, four hundred twenty-one million, one hundred twenty-four thousand, four hundred nine".