1421240023 has 16 divisors (see below), whose sum is σ = 1643652864. Its totient is φ = 1203713280.

The previous prime is 1421240011. The next prime is 1421240027. The reversal of 1421240023 is 3200421241.

It is a de Polignac number, because none of the positive numbers 2^k-1421240023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421240027) 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, 560268 + ... + 562798.

It is an arithmetic number, because the mean of its divisors is an integer number (102728304).

Almost surely, 2^1421240023 is an apocalyptic number.

1421240023 is a deficient number, since it is larger than the sum of its proper divisors (222412841).

1421240023 is an equidigital number, since it uses as much as digits as its factorization.

1421240023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1421240023 is about 37699.3371692395. The cubic root of 1421240023 is about 1124.3179465423.

Adding to 1421240023 its reverse (3200421241), we get a palindrome (4621661264).

The spelling of 1421240023 in words is "one billion, four hundred twenty-one million, two hundred forty thousand, twenty-three".