121780362 has 16 divisors (see below), whose sum is σ = 265702752. Its totient is φ = 36903120.

The previous prime is 121780361. The next prime is 121780363. The reversal of 121780362 is 263087121.

It is an interprime number because it is at equal distance from previous prime (121780361) and next prime (121780363).

It is not an unprimeable number, because it can be changed into a prime (121780361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 922513 + ... + 922644.

It is an arithmetic number, because the mean of its divisors is an integer number (16606422).

Almost surely, 2^121780362 is an apocalyptic number.

121780362 is an abundant number, since it is smaller than the sum of its proper divisors (143922390).

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

121780362 is a wasteful number, since it uses less digits than its factorization.

121780362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845173.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 121780362 is about 11035.4139931404. The cubic root of 121780362 is about 495.6697555615.

The spelling of 121780362 in words is "one hundred twenty-one million, seven hundred eighty thousand, three hundred sixty-two".