1225143043 has 4 divisors (see below), whose sum is σ = 1225517488. Its totient is φ = 1224768600.

The previous prime is 1225143041. The next prime is 1225143067. The reversal of 1225143043 is 3403415221.

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 1225143043 - 2¹ = 1225143041 is a prime.

It is a super-2 number, since 2×1225143043² = 3001950951622599698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1225142999 and 1225143017.

It is not an unprimeable number, because it can be changed into a prime (1225143041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182271 + ... + 188872.

It is an arithmetic number, because the mean of its divisors is an integer number (306379372).

Almost surely, 2^1225143043 is an apocalyptic number.

1225143043 is a deficient number, since it is larger than the sum of its proper divisors (374445).

1225143043 is an equidigital number, since it uses as much as digits as its factorization.

1225143043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374444.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1225143043 is about 35002.0434117781. The cubic root of 1225143043 is about 1070.0291263507.

Adding to 1225143043 its reverse (3403415221), we get a palindrome (4628558264).

The spelling of 1225143043 in words is "one billion, two hundred twenty-five million, one hundred forty-three thousand, forty-three".