1225142311 has 6 divisors (see below), whose sum is σ = 1280725880. Its totient is φ = 1171874748.

The previous prime is 1225142299. The next prime is 1225142339. The reversal of 1225142311 is 1132415221.

It is not a de Polignac number, because 1225142311 - 2⁷ = 1225142183 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 (1225142341) 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 5 ways as a sum of consecutive naturals, for example, 1157451 + ... + 1158508.

Almost surely, 2^1225142311 is an apocalyptic number.

1225142311 is a deficient number, since it is larger than the sum of its proper divisors (55583569).

1225142311 is an equidigital number, since it uses as much as digits as its factorization.

1225142311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316005 (or 2315982 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 1225142311 is about 35002.0329552442. The cubic root of 1225142311 is about 1070.0289132432.

Adding to 1225142311 its reverse (1132415221), we get a palindrome (2357557532).

The spelling of 1225142311 in words is "one billion, two hundred twenty-five million, one hundred forty-two thousand, three hundred eleven".