1284920120 has 32 divisors (see below), whose sum is σ = 3153895920. Its totient is φ = 467243520.

The previous prime is 1284920099. The next prime is 1284920137. The reversal of 1284920120 is 210294821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1459697 + ... + 1460576.

Almost surely, 2^1284920120 is an apocalyptic number.

1284920120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1284920120 is an abundant number, since it is smaller than the sum of its proper divisors (1868975800).

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

1284920120 is a wasteful number, since it uses less digits than its factorization.

1284920120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920295 (or 2920291 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 1284920120 is about 35845.7824576337. The cubic root of 1284920120 is about 1087.1564409096.

The spelling of 1284920120 in words is "one billion, two hundred eighty-four million, nine hundred twenty thousand, one hundred twenty".