1226361143 has 4 divisors (see below), whose sum is σ = 1401555600. Its totient is φ = 1051166688.

The previous prime is 1226361139. The next prime is 1226361163. The reversal of 1226361143 is 3411636221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1226361143 - 2² = 1226361139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226361163) 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, 87597218 + ... + 87597231.

It is an arithmetic number, because the mean of its divisors is an integer number (350388900).

Almost surely, 2^1226361143 is an apocalyptic number.

1226361143 is a deficient number, since it is larger than the sum of its proper divisors (175194457).

1226361143 is an equidigital number, since it uses as much as digits as its factorization.

1226361143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175194456.

The product of its digits is 5184, while the sum is 29.

The square root of 1226361143 is about 35019.4395015112. The cubic root of 1226361143 is about 1070.3836348181.

Adding to 1226361143 its reverse (3411636221), we get a palindrome (4637997364).

The spelling of 1226361143 in words is "one billion, two hundred twenty-six million, three hundred sixty-one thousand, one hundred forty-three".