1121436531 has 12 divisors (see below), whose sum is σ = 1620637200. Its totient is φ = 747262320.

The previous prime is 1121436509. The next prime is 1121436539. The reversal of 1121436531 is 1356341211.

It is a happy number.

1121436531 is a `hidden beast` number, since 1 + 1 + 2 + 1 + 4 + 3 + 653 + 1 = 666.

It is not a de Polignac number, because 1121436531 - 2¹⁰ = 1121435507 is a prime.

It is a super-2 number, since 2×1121436531² = 2515239786122627922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121436495 and 1121436504.

It is not an unprimeable number, because it can be changed into a prime (1121436539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9831 + ... + 48368.

It is an arithmetic number, because the mean of its divisors is an integer number (135053100).

Almost surely, 2^1121436531 is an apocalyptic number.

1121436531 is a deficient number, since it is larger than the sum of its proper divisors (499200669).

1121436531 is a wasteful number, since it uses less digits than its factorization.

1121436531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60346 (or 60343 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1121436531 is about 33487.8564706671. The cubic root of 1121436531 is about 1038.9426294134.

Adding to 1121436531 its reverse (1356341211), we get a palindrome (2477777742).

The spelling of 1121436531 in words is "one billion, one hundred twenty-one million, four hundred thirty-six thousand, five hundred thirty-one".