1143436257 has 48 divisors (see below), whose sum is σ = 1783192320. Its totient is φ = 731607552.

The previous prime is 1143436243. The next prime is 1143436297. The reversal of 1143436257 is 7526343411.

It is not a de Polignac number, because 1143436257 - 2⁴ = 1143436241 is a prime.

It is a super-3 number, since 3×1143436257³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1143436297) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 604369 + ... + 606257.

It is an arithmetic number, because the mean of its divisors is an integer number (37149840).

Almost surely, 2^1143436257 is an apocalyptic number.

It is an amenable number.

1143436257 is a deficient number, since it is larger than the sum of its proper divisors (639756063).

1143436257 is an equidigital number, since it uses as much as digits as its factorization.

1143436257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004 (or 1992 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 1143436257 is about 33814.7343180454. The cubic root of 1143436257 is about 1045.6924836367.

Adding to 1143436257 its reverse (7526343411), we get a palindrome (8669779668).

The spelling of 1143436257 in words is "one billion, one hundred forty-three million, four hundred thirty-six thousand, two hundred fifty-seven".