1225511143 has 8 divisors (see below), whose sum is σ = 1234598400. Its totient is φ = 1216435680.

The previous prime is 1225511141. The next prime is 1225511171. The reversal of 1225511143 is 3411155221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1225511143 - 2¹ = 1225511141 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 (1225511141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398833 + ... + 401893.

It is an arithmetic number, because the mean of its divisors is an integer number (154324800).

Almost surely, 2^1225511143 is an apocalyptic number.

1225511143 is a deficient number, since it is larger than the sum of its proper divisors (9087257).

1225511143 is a wasteful number, since it uses less digits than its factorization.

1225511143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5897.

The product of its digits is 1200, while the sum is 25.

The square root of 1225511143 is about 35007.3012813042. The cubic root of 1225511143 is about 1070.1362807174.

Adding to 1225511143 its reverse (3411155221), we get a palindrome (4636666364).

The spelling of 1225511143 in words is "one billion, two hundred twenty-five million, five hundred eleven thousand, one hundred forty-three".