1275750000 has 490 divisors, whose sum is σ = 5294150984. Its totient is φ = 291600000.

The previous prime is 1275749987. The next prime is 1275750001. The reversal of 1275750000 is 575721.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is a zygodrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275750001) by changing a digit.

It is a polite number, since it can be written in 97 ways as a sum of consecutive naturals, for example, 182249997 + ... + 182250003.

Almost surely, 2^1275750000 is an apocalyptic number.

1275750000 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 1275750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2647075492).

1275750000 is an abundant number, since it is smaller than the sum of its proper divisors (4018400984).

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

1275750000 is an frugal number, since it uses more digits than its factorization.

1275750000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 1275750000 is about 35717.6426993720. The cubic root of 1275750000 is about 1084.5640188789.

The spelling of 1275750000 in words is "one billion, two hundred seventy-five million, seven hundred fifty thousand".