1121195280 has 40 divisors (see below), whose sum is σ = 3475706112. Its totient is φ = 298985344.

The previous prime is 1121195279. The next prime is 1121195297. The reversal of 1121195280 is 825911211.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 2335584 + ... + 2336063.

Almost surely, 2^1121195280 is an apocalyptic number.

1121195280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121195280 is an abundant number, since it is smaller than the sum of its proper divisors (2354510832).

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

1121195280 is a wasteful number, since it uses less digits than its factorization.

1121195280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671663 (or 4671657 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 1121195280 is about 33484.2542100015. The cubic root of 1121195280 is about 1038.8681226187.

It can be divided in two parts, 11211 and 95280, that added together give a triangular number (106491 = T₄₆₁).

The spelling of 1121195280 in words is "one billion, one hundred twenty-one million, one hundred ninety-five thousand, two hundred eighty".