1240412421 has 8 divisors (see below), whose sum is σ = 1656781984. Its totient is φ = 825492240.

The previous prime is 1240412419. The next prime is 1240412501. The reversal of 1240412421 is 1242140421.

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

It is not a de Polignac number, because 1240412421 - 2¹ = 1240412419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240412521) 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, 360346 + ... + 363771.

It is an arithmetic number, because the mean of its divisors is an integer number (207097748).

Almost surely, 2^1240412421 is an apocalyptic number.

It is an amenable number.

1240412421 is a deficient number, since it is larger than the sum of its proper divisors (416369563).

1240412421 is an equidigital number, since it uses as much as digits as its factorization.

1240412421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724691.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1240412421 is about 35219.4892211684. The cubic root of 1240412421 is about 1074.4561650900.

Adding to 1240412421 its reverse (1242140421), we get a palindrome (2482552842).

Subtracting 1240412421 from its reverse (1242140421), we obtain a cube (1728000 = 120³).

The spelling of 1240412421 in words is "one billion, two hundred forty million, four hundred twelve thousand, four hundred twenty-one".