1140042551 has 4 divisors (see below), whose sum is σ = 1149019392. Its totient is φ = 1131065712.

The previous prime is 1140042539. The next prime is 1140042583. The reversal of 1140042551 is 1552400411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1552400411 = 6481 ⋅239531.

It is a cyclic number.

It is not a de Polignac number, because 1140042551 - 2⁶ = 1140042487 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 (1140042851) 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, 4488230 + ... + 4488483.

It is an arithmetic number, because the mean of its divisors is an integer number (287254848).

Almost surely, 2^1140042551 is an apocalyptic number.

1140042551 is a deficient number, since it is larger than the sum of its proper divisors (8976841).

1140042551 is an equidigital number, since it uses as much as digits as its factorization.

1140042551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8976840.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1140042551 is about 33764.5161523159. The cubic root of 1140042551 is about 1044.6569239249.

Adding to 1140042551 its reverse (1552400411), we get a palindrome (2692442962).

The spelling of 1140042551 in words is "one billion, one hundred forty million, forty-two thousand, five hundred fifty-one".