1274217019920 has 1440 divisors, whose sum is σ = 5129390448000. Its totient is φ = 292996694016.

The previous prime is 1274217019913. The next prime is 1274217019963. The reversal of 1274217019920 is 299107124721.

It is a happy number.

1274217019920 is a `hidden beast` number, since 1 + 274 + 2 + 170 + 199 + 20 = 666.

It is a super-3 number, since 3×1274217019920³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 8551792006 + ... + 8551792154.

It is an arithmetic number, because the mean of its divisors is an integer number (3562076700).

Almost surely, 2^{1274217019920} is an apocalyptic number.

1274217019920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1274217019920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2564695224000).

1274217019920 is an abundant number, since it is smaller than the sum of its proper divisors (3855173428080).

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

1274217019920 is a wasteful number, since it uses less digits than its factorization.

1274217019920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 1274217019920 in words is "one trillion, two hundred seventy-four billion, two hundred seventeen million, nineteen thousand, nine hundred twenty".