1201780275 has 24 divisors (see below), whose sum is σ = 1989723840. Its totient is φ = 640052640.

The previous prime is 1201780249. The next prime is 1201780277. The reversal of 1201780275 is 5720871021.

1201780275 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1201780275 - 2⁵ = 1201780243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201780277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44584 + ... + 66266.

It is an arithmetic number, because the mean of its divisors is an integer number (82905160).

Almost surely, 2^1201780275 is an apocalyptic number.

1201780275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1201780275 is a deficient number, since it is larger than the sum of its proper divisors (787943565).

1201780275 is a wasteful number, since it uses less digits than its factorization.

1201780275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22435 (or 22430 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 1201780275 is about 34666.7026842762. The cubic root of 1201780275 is about 1063.1838163237.

The spelling of 1201780275 in words is "one billion, two hundred one million, seven hundred eighty thousand, two hundred seventy-five".