1140213421 has 4 divisors (see below), whose sum is σ = 1140282432. Its totient is φ = 1140144412.

The previous prime is 1140213401. The next prime is 1140213461. The reversal of 1140213421 is 1243120411.

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 1140213421 - 2²¹ = 1138116269 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 (1140213401) 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 3 ways as a sum of consecutive naturals, for example, 6606 + ... + 48208.

It is an arithmetic number, because the mean of its divisors is an integer number (285070608).

Almost surely, 2^1140213421 is an apocalyptic number.

It is an amenable number.

1140213421 is a deficient number, since it is larger than the sum of its proper divisors (69011).

1140213421 is an equidigital number, since it uses as much as digits as its factorization.

1140213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69010.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1140213421 is about 33767.0463766081. The cubic root of 1140213421 is about 1044.7091125066.

Adding to 1140213421 its reverse (1243120411), we get a palindrome (2383333832).

The spelling of 1140213421 in words is "one billion, one hundred forty million, two hundred thirteen thousand, four hundred twenty-one".