1143535421 has 8 divisors (see below), whose sum is σ = 1337290944. Its totient is φ = 957378240.

The previous prime is 1143535417. The next prime is 1143535439. The reversal of 1143535421 is 1245353411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1143535421 - 2² = 1143535417 is a prime.

It is a super-3 number, since 3×1143535421³ (a number of 28 digits) contains 333 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 (1143535441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1899260 + ... + 1899861.

It is an arithmetic number, because the mean of its divisors is an integer number (167161368).

Almost surely, 2^1143535421 is an apocalyptic number.

It is an amenable number.

1143535421 is a deficient number, since it is larger than the sum of its proper divisors (193755523).

1143535421 is an equidigital number, since it uses as much as digits as its factorization.

1143535421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799171.

The product of its digits is 7200, while the sum is 29.

The square root of 1143535421 is about 33816.2005701409. The cubic root of 1143535421 is about 1045.7227118345.

Adding to 1143535421 its reverse (1245353411), we get a palindrome (2388888832).

The spelling of 1143535421 in words is "one billion, one hundred forty-three million, five hundred thirty-five thousand, four hundred twenty-one".