1121305920 has 112 divisors (see below), whose sum is σ = 4068763008. Its totient is φ = 256296960.

The previous prime is 1121305879. The next prime is 1121305921. The reversal of 1121305920 is 295031211.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121305921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76711 + ... + 90150.

Almost surely, 2^1121305920 is an apocalyptic number.

1121305920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121305920 is an abundant number, since it is smaller than the sum of its proper divisors (2947457088).

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

1121305920 is a wasteful number, since it uses less digits than its factorization.

1121305920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166888 (or 166878 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1121305920 is about 33485.9062890644. The cubic root of 1121305920 is about 1038.9022934691.

The spelling of 1121305920 in words is "one billion, one hundred twenty-one million, three hundred five thousand, nine hundred twenty".