1121342553 has 6 divisors (see below), whose sum is σ = 1619717034. Its totient is φ = 747561696.

The previous prime is 1121342549. The next prime is 1121342567. The reversal of 1121342553 is 3552431211.

It can be written as a sum of positive squares in only one way, i.e., 632623104 + 488719449 = 25152^2 + 22107^2 .

It is not a de Polignac number, because 1121342553 - 2² = 1121342549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121342543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62296800 + ... + 62296817.

It is an arithmetic number, because the mean of its divisors is an integer number (269952839).

Almost surely, 2^1121342553 is an apocalyptic number.

It is an amenable number.

1121342553 is a deficient number, since it is larger than the sum of its proper divisors (498374481).

1121342553 is a wasteful number, since it uses less digits than its factorization.

1121342553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124593623 (or 124593620 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1121342553 is about 33486.4532759144. The cubic root of 1121342553 is about 1038.9136069720.

Adding to 1121342553 its reverse (3552431211), we get a palindrome (4673773764).

The spelling of 1121342553 in words is "one billion, one hundred twenty-one million, three hundred forty-two thousand, five hundred fifty-three".