1275897280000 has 300 divisors, whose sum is σ = 3705753382452. Its totient is φ = 437445120000.

The previous prime is 1275897279949. The next prime is 1275897280003. The reversal of 1275897280000 is 827985721.

It is a super-2 number, since 2×1275897280000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275897280003) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 15639315 + ... + 15720685.

Almost surely, 2^{1275897280000} is an apocalyptic number.

1275897280000 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 1275897280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1852876691226).

1275897280000 is an abundant number, since it is smaller than the sum of its proper divisors (2429856102452).

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

1275897280000 is an frugal number, since it uses more digits than its factorization.

1275897280000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81423 (or 81385 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 1275897280000 in words is "one trillion, two hundred seventy-five billion, eight hundred ninety-seven million, two hundred eighty thousand".