1121555534 has 12 divisors (see below), whose sum is σ = 1849176672. Its totient is φ = 509797860.

The previous prime is 1121555521. The next prime is 1121555537. The reversal of 1121555534 is 4355551211.

It is a self number, because there is not a number n which added to its sum of digits gives 1121555534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121555537) 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, 2317022 + ... + 2317505.

It is an arithmetic number, because the mean of its divisors is an integer number (154098056).

Almost surely, 2^1121555534 is an apocalyptic number.

1121555534 is a deficient number, since it is larger than the sum of its proper divisors (727621138).

1121555534 is a wasteful number, since it uses less digits than its factorization.

1121555534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4634551 (or 4634540 counting only the distinct ones).

The product of its digits is 15000, while the sum is 32.

The square root of 1121555534 is about 33489.6332317928. The cubic root of 1121555534 is about 1038.9793777902.

It can be divided in two parts, 1121 and 555534, that added together give a palindrome (556655).

The spelling of 1121555534 in words is "one billion, one hundred twenty-one million, five hundred fifty-five thousand, five hundred thirty-four".