1240000421 has 16 divisors (see below), whose sum is σ = 1374148800. Its totient is φ = 1109539200.

The previous prime is 1240000393. The next prime is 1240000429.

1240000421 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-1240000421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240000396 and 1240000405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240000429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221426 + ... + 226956.

It is an arithmetic number, because the mean of its divisors is an integer number (85884300).

Almost surely, 2^1240000421 is an apocalyptic number.

1240000421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1240000421 is a deficient number, since it is larger than the sum of its proper divisors (134148379).

1240000421 is a wasteful number, since it uses less digits than its factorization.

1240000421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5860.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1240000421 is about 35213.6397011158. The cubic root of 1240000421 is about 1074.3371925739.

It can be divided in two parts, 1240000 and 421, that added together give a palindrome (1240421).

The spelling of 1240000421 in words is "one billion, two hundred forty million, four hundred twenty-one", and thus it is an aban number.