1143624121 has 4 divisors (see below), whose sum is σ = 1143718272. Its totient is φ = 1143529972.

The previous prime is 1143624113. The next prime is 1143624127. The reversal of 1143624121 is 1214263411.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1214263411 = 30259 ⋅40129.

It is a cyclic number.

It is not a de Polignac number, because 1143624121 - 2³ = 1143624113 is a prime.

It is a super-2 number, since 2×1143624121² = 2615752260266045282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143624127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25585 + ... + 54238.

It is an arithmetic number, because the mean of its divisors is an integer number (285929568).

Almost surely, 2^1143624121 is an apocalyptic number.

It is an amenable number.

1143624121 is a deficient number, since it is larger than the sum of its proper divisors (94151).

1143624121 is an equidigital number, since it uses as much as digits as its factorization.

1143624121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94150.

The product of its digits is 1152, while the sum is 25.

The square root of 1143624121 is about 33817.5120462757. The cubic root of 1143624121 is about 1045.7497488068.

Adding to 1143624121 its reverse (1214263411), we get a palindrome (2357887532).

The spelling of 1143624121 in words is "one billion, one hundred forty-three million, six hundred twenty-four thousand, one hundred twenty-one".