1284121320 has 32 divisors (see below), whose sum is σ = 3852364320. Its totient is φ = 342432320.

The previous prime is 1284121301. The next prime is 1284121351. The reversal of 1284121320 is 231214821.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 5350386 + ... + 5350625.

It is an arithmetic number, because the mean of its divisors is an integer number (120386385).

Almost surely, 2^1284121320 is an apocalyptic number.

1284121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1284121320 is an abundant number, since it is smaller than the sum of its proper divisors (2568243000).

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

1284121320 is a wasteful number, since it uses less digits than its factorization.

1284121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10701025 (or 10701021 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1284121320 is about 35834.6385498724. The cubic root of 1284121320 is about 1086.9311089813.

The spelling of 1284121320 in words is "one billion, two hundred eighty-four million, one hundred twenty-one thousand, three hundred twenty".