1371221180 has 48 divisors (see below), whose sum is σ = 3296455680. Its totient is φ = 469343808.

The previous prime is 1371221167. The next prime is 1371221209. The reversal of 1371221180 is 811221731.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 78749 + ... + 94571.

It is an arithmetic number, because the mean of its divisors is an integer number (68676160).

Almost surely, 2^1371221180 is an apocalyptic number.

1371221180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1371221180 is an abundant number, since it is smaller than the sum of its proper divisors (1925234500).

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

1371221180 is a wasteful number, since it uses less digits than its factorization.

1371221180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16458 (or 16456 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 1371221180 is about 37030.0037807181. The cubic root of 1371221180 is about 1110.9704415324.

The spelling of 1371221180 in words is "one billion, three hundred seventy-one million, two hundred twenty-one thousand, one hundred eighty".