1143342457 has 4 divisors (see below), whose sum is σ = 1144550736. Its totient is φ = 1142134180.

The previous prime is 1143342451. The next prime is 1143342469. The reversal of 1143342457 is 7542433411.

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 an emirpimes, since its reverse is a distinct semiprime: 7542433411 = 67 ⋅112573633.

It is a cyclic number.

It is not a de Polignac number, because 1143342457 - 2³ = 1143342449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143342451) 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, 602719 + ... + 604612.

It is an arithmetic number, because the mean of its divisors is an integer number (286137684).

Almost surely, 2^1143342457 is an apocalyptic number.

It is an amenable number.

1143342457 is a deficient number, since it is larger than the sum of its proper divisors (1208279).

1143342457 is an equidigital number, since it uses as much as digits as its factorization.

1143342457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208278.

The product of its digits is 40320, while the sum is 34.

The square root of 1143342457 is about 33813.3473202521. The cubic root of 1143342457 is about 1045.6638889405.

Adding to 1143342457 its reverse (7542433411), we get a palindrome (8685775868).

The spelling of 1143342457 in words is "one billion, one hundred forty-three million, three hundred forty-two thousand, four hundred fifty-seven".