1140240421 has 4 divisors (see below), whose sum is σ = 1140310912. Its totient is φ = 1140169932.

The previous prime is 1140240401. The next prime is 1140240443. The reversal of 1140240421 is 1240420411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1140240421 - 2¹⁷ = 1140109349 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 (1140240401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2476 + ... + 47818.

It is an arithmetic number, because the mean of its divisors is an integer number (285077728).

Almost surely, 2^1140240421 is an apocalyptic number.

It is an amenable number.

1140240421 is a deficient number, since it is larger than the sum of its proper divisors (70491).

1140240421 is an equidigital number, since it uses as much as digits as its factorization.

1140240421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70490.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1140240421 is about 33767.4461723122. The cubic root of 1140240421 is about 1044.7173586012.

Adding to 1140240421 its reverse (1240420411), we get a palindrome (2380660832).

The spelling of 1140240421 in words is "one billion, one hundred forty million, two hundred forty thousand, four hundred twenty-one".