1140421531 has 4 divisors (see below), whose sum is σ = 1152178552. Its totient is φ = 1128664512.

The previous prime is 1140421501. The next prime is 1140421567. The reversal of 1140421531 is 1351240411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1351240411 = 79 ⋅17104309.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1140421531 is a prime.

It is a super-2 number, since 2×1140421531² = 2601122536736767922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1140421501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5878365 + ... + 5878558.

It is an arithmetic number, because the mean of its divisors is an integer number (288044638).

Almost surely, 2^1140421531 is an apocalyptic number.

1140421531 is a deficient number, since it is larger than the sum of its proper divisors (11757021).

1140421531 is an equidigital number, since it uses as much as digits as its factorization.

1140421531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11757020.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1140421531 is about 33770.1277906969. The cubic root of 1140421531 is about 1044.7726682068.

Adding to 1140421531 its reverse (1351240411), we get a palindrome (2491661942).

The spelling of 1140421531 in words is "one billion, one hundred forty million, four hundred twenty-one thousand, five hundred thirty-one".