1921290120 has 96 divisors (see below), whose sum is σ = 6412999320. Its totient is φ = 498493440.

The previous prime is 1921290043. The next prime is 1921290143. The reversal of 1921290120 is 210921291.

It can be written as a sum of positive squares in 4 ways, for example, as 1867795524 + 53494596 = 43218^2 + 7314^2 .

It is a super-2 number, since 2×1921290120² = 7382711450419228800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58801 + ... + 85440.

Almost surely, 2^1921290120 is an apocalyptic number.

1921290120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1921290120 is an abundant number, since it is smaller than the sum of its proper divisors (4491709200).

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

1921290120 is a wasteful number, since it uses less digits than its factorization.

1921290120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144295 (or 144288 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1921290120 is about 43832.5235413158. The cubic root of 1921290120 is about 1243.1713221919.

The spelling of 1921290120 in words is "one billion, nine hundred twenty-one million, two hundred ninety thousand, one hundred twenty".