1401165220 has 48 divisors (see below), whose sum is σ = 3621477888. Its totient is φ = 443445120.

The previous prime is 1401165209. The next prime is 1401165253. The reversal of 1401165220 is 225611041.

It is a junction number, because it is equal to n+sod(n) for n = 1401165191 and 1401165200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383116 + ... + 386755.

It is an arithmetic number, because the mean of its divisors is an integer number (75447456).

Almost surely, 2^1401165220 is an apocalyptic number.

1401165220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401165220 is an abundant number, since it is smaller than the sum of its proper divisors (2220312668).

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

1401165220 is a wasteful number, since it uses less digits than its factorization.

1401165220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769900 (or 769898 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1401165220 is about 37432.1415363855. The cubic root of 1401165220 is about 1118.9992176187. Note that the first 3 decimals are identical.

Adding to 1401165220 its reverse (225611041), we get a palindrome (1626776261).

The spelling of 1401165220 in words is "one billion, four hundred one million, one hundred sixty-five thousand, two hundred twenty".