1121405404 has 24 divisors (see below), whose sum is σ = 2249256800. Its totient is φ = 479221056.

The previous prime is 1121405399. The next prime is 1121405419. The reversal of 1121405404 is 4045041211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47607 + ... + 67150.

Almost surely, 2^1121405404 is an apocalyptic number.

1121405404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1121405404 is an abundant number, since it is smaller than the sum of its proper divisors (1127851396).

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

1121405404 is a wasteful number, since it uses less digits than its factorization.

1121405404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115117 (or 115115 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1121405404 is about 33487.3917168835. The cubic root of 1121405404 is about 1038.9330169014.

Adding to 1121405404 its reverse (4045041211), we get a palindrome (5166446615).

The spelling of 1121405404 in words is "one billion, one hundred twenty-one million, four hundred five thousand, four hundred four".