1161214780 has 24 divisors (see below), whose sum is σ = 2660238000. Its totient is φ = 422259840.

The previous prime is 1161214763. The next prime is 1161214783. The reversal of 1161214780 is 874121611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161214783) 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 7 ways as a sum of consecutive naturals, for example, 2638905 + ... + 2639344.

It is an arithmetic number, because the mean of its divisors is an integer number (110843250).

Almost surely, 2^1161214780 is an apocalyptic number.

1161214780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161214780 is an abundant number, since it is smaller than the sum of its proper divisors (1499023220).

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

1161214780 is a wasteful number, since it uses less digits than its factorization.

1161214780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278269 (or 5278267 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1161214780 is about 34076.6016498124. The cubic root of 1161214780 is about 1051.0842254752.

The spelling of 1161214780 in words is "one billion, one hundred sixty-one million, two hundred fourteen thousand, seven hundred eighty".