1121542236 has 18 divisors (see below), whose sum is σ = 2835009632. Its totient is φ = 373847400.

The previous prime is 1121542229. The next prime is 1121542243. The reversal of 1121542236 is 6322451211.

1121542236 is a `hidden beast` number, since 112 + 1 + 542 + 2 + 3 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1121542229) and next prime (1121542243).

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15576940 + ... + 15577011.

Almost surely, 2^1121542236 is an apocalyptic number.

It is an amenable number.

1121542236 is an abundant number, since it is smaller than the sum of its proper divisors (1713467396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121542236 is a wasteful number, since it uses less digits than its factorization.

1121542236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31153961 (or 31153956 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1121542236 is about 33489.4346921533. The cubic root of 1121542236 is about 1038.9752714688.

Adding to 1121542236 its reverse (6322451211), we get a palindrome (7443993447).

The spelling of 1121542236 in words is "one billion, one hundred twenty-one million, five hundred forty-two thousand, two hundred thirty-six".