1420243121 has 16 divisors (see below), whose sum is σ = 1644183360. Its totient is φ = 1212449280.

The previous prime is 1420243091. The next prime is 1420243127. The reversal of 1420243121 is 1213420241.

It is a cyclic number.

It is not a de Polignac number, because 1420243121 - 2²⁶ = 1353134257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1420243093 and 1420243102.

It is not an unprimeable number, because it can be changed into a prime (1420243127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77150 + ... + 93768.

It is an arithmetic number, because the mean of its divisors is an integer number (102761460).

Almost surely, 2^1420243121 is an apocalyptic number.

1420243121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1420243121 is a deficient number, since it is larger than the sum of its proper divisors (223940239).

1420243121 is a wasteful number, since it uses less digits than its factorization.

1420243121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17104.

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

The square root of 1420243121 is about 37686.1131054929. The cubic root of 1420243121 is about 1124.0550078511.

Adding to 1420243121 its reverse (1213420241), we get a palindrome (2633663362).

The spelling of 1420243121 in words is "one billion, four hundred twenty million, two hundred forty-three thousand, one hundred twenty-one".