1201773220 has 12 divisors (see below), whose sum is σ = 2523723804. Its totient is φ = 480709280.

The previous prime is 1201773173. The next prime is 1201773227. The reversal of 1201773220 is 223771021.

It can be written as a sum of positive squares in 2 ways, for example, as 180203776 + 1021569444 = 13424^2 + 31962^2 .

It is not an unprimeable number, because it can be changed into a prime (1201773227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30044311 + ... + 30044350.

It is an arithmetic number, because the mean of its divisors is an integer number (210310317).

Almost surely, 2^1201773220 is an apocalyptic number.

1201773220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201773220 is an abundant number, since it is smaller than the sum of its proper divisors (1321950584).

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

1201773220 is a wasteful number, since it uses less digits than its factorization.

1201773220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60088670 (or 60088668 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 1201773220 is about 34666.6009294249. The cubic root of 1201773220 is about 1063.1817358612.

The spelling of 1201773220 in words is "one billion, two hundred one million, seven hundred seventy-three thousand, two hundred twenty".