1143542077 has 12 divisors (see below), whose sum is σ = 1216858356. Its totient is φ = 1074421760.

The previous prime is 1143542069. The next prime is 1143542107. The reversal of 1143542077 is 7702453411.

It can be written as a sum of positive squares in 6 ways, for example, as 37380996 + 1106161081 = 6114^2 + 33259^2 .

It is not a de Polignac number, because 1143542077 - 2³ = 1143542069 is a prime.

It is a super-4 number, since 4×1143542077⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143542047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182163 + ... + 188335.

It is an arithmetic number, because the mean of its divisors is an integer number (101404863).

Almost surely, 2^1143542077 is an apocalyptic number.

1143542077 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1143542077 is a deficient number, since it is larger than the sum of its proper divisors (73316279).

1143542077 is an equidigital number, since it uses as much as digits as its factorization.

1143542077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6848 (or 6831 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 1143542077 is about 33816.2989843655. The cubic root of 1143542077 is about 1045.7247407228.

Adding to 1143542077 its reverse (7702453411), we get a palindrome (8845995488).

The spelling of 1143542077 in words is "one billion, one hundred forty-three million, five hundred forty-two thousand, seventy-seven".