1225424143 has 4 divisors (see below), whose sum is σ = 1235073280. Its totient is φ = 1215775008.

The previous prime is 1225424131. The next prime is 1225424149. The reversal of 1225424143 is 3414245221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3414245221 = 6949 ⋅491329.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225424143 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 (1225424149) 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, 4824378 + ... + 4824631.

It is an arithmetic number, because the mean of its divisors is an integer number (308768320).

Almost surely, 2^1225424143 is an apocalyptic number.

1225424143 is a deficient number, since it is larger than the sum of its proper divisors (9649137).

1225424143 is an equidigital number, since it uses as much as digits as its factorization.

1225424143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9649136.

The product of its digits is 7680, while the sum is 28.

The square root of 1225424143 is about 35006.0586613232. The cubic root of 1225424143 is about 1070.1109568460.

Adding to 1225424143 its reverse (3414245221), we get a palindrome (4639669364).

The spelling of 1225424143 in words is "one billion, two hundred twenty-five million, four hundred twenty-four thousand, one hundred forty-three".