1240421441 has 16 divisors (see below), whose sum is σ = 1557120000. Its totient is φ = 963463248.

The previous prime is 1240421419. The next prime is 1240421447. The reversal of 1240421441 is 1441240421.

It is a de Polignac number, because none of the positive numbers 2^k-1240421441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240421447) 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, 199691 + ... + 205808.

It is an arithmetic number, because the mean of its divisors is an integer number (97320000).

Almost surely, 2^1240421441 is an apocalyptic number.

It is an amenable number.

1240421441 is a deficient number, since it is larger than the sum of its proper divisors (316698559).

1240421441 is a wasteful number, since it uses less digits than its factorization.

1240421441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405548.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1240421441 is about 35219.6172750358. The cubic root of 1240421441 is about 1074.4587694848.

Adding to 1240421441 its reverse (1441240421), we get a palindrome (2681661862).

The spelling of 1240421441 in words is "one billion, two hundred forty million, four hundred twenty-one thousand, four hundred forty-one".