1122541820 has 24 divisors (see below), whose sum is σ = 2358232800. Its totient is φ = 448846272.

The previous prime is 1122541811. The next prime is 1122541867. The reversal of 1122541820 is 281452211.

It is a self number, because there is not a number n which added to its sum of digits gives 1122541820.

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, 52466 + ... + 70694.

It is an arithmetic number, because the mean of its divisors is an integer number (98259700).

Almost surely, 2^1122541820 is an apocalyptic number.

1122541820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122541820 is an abundant number, since it is smaller than the sum of its proper divisors (1235690980).

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

1122541820 is a wasteful number, since it uses less digits than its factorization.

1122541820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21317 (or 21315 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 1122541820 is about 33504.3552392820. The cubic root of 1122541820 is about 1039.2838449790.

The spelling of 1122541820 in words is "one billion, one hundred twenty-two million, five hundred forty-one thousand, eight hundred twenty".