1238448421 has 8 divisors (see below), whose sum is σ = 1416008384. Its totient is φ = 1061048160.

The previous prime is 1238448391. The next prime is 1238448437. The reversal of 1238448421 is 1248448321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1238448421 - 2⁵ = 1238448389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238448821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22815 + ... + 54748.

It is an arithmetic number, because the mean of its divisors is an integer number (177001048).

Almost surely, 2^1238448421 is an apocalyptic number.

It is an amenable number.

1238448421 is a deficient number, since it is larger than the sum of its proper divisors (177559963).

1238448421 is an equidigital number, since it uses as much as digits as its factorization.

1238448421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79851.

The product of its digits is 49152, while the sum is 37.

The square root of 1238448421 is about 35191.5958859498. The cubic root of 1238448421 is about 1073.8887875000. Note that the first 3 decimals are identical.

The spelling of 1238448421 in words is "one billion, two hundred thirty-eight million, four hundred forty-eight thousand, four hundred twenty-one".