1240231421 has 8 divisors (see below), whose sum is σ = 1457055264. Its totient is φ = 1040753520.

The previous prime is 1240231381. The next prime is 1240231459. The reversal of 1240231421 is 1241320421.

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 1240231421 - 2³⁰ = 166489597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240231393 and 1240231402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240231021) 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, 4336331 + ... + 4336616.

It is an arithmetic number, because the mean of its divisors is an integer number (182131908).

Almost surely, 2^1240231421 is an apocalyptic number.

1240231421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1240231421 is a deficient number, since it is larger than the sum of its proper divisors (216823843).

1240231421 is a wasteful number, since it uses less digits than its factorization.

1240231421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8672971.

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

The square root of 1240231421 is about 35216.9195274090. The cubic root of 1240231421 is about 1074.4039012831.

Adding to 1240231421 its reverse (1241320421), we get a palindrome (2481551842).

The spelling of 1240231421 in words is "one billion, two hundred forty million, two hundred thirty-one thousand, four hundred twenty-one".