1275147900 has 288 divisors, whose sum is σ = 4676575680. Its totient is φ = 295280640.

The previous prime is 1275147869. The next prime is 1275147911. The reversal of 1275147900 is 97415721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 595632 + ... + 597768.

It is an arithmetic number, because the mean of its divisors is an integer number (16238110).

Almost surely, 2^1275147900 is an apocalyptic number.

1275147900 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 1275147900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2338287840).

1275147900 is an abundant number, since it is smaller than the sum of its proper divisors (3401427780).

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

1275147900 is a wasteful number, since it uses less digits than its factorization.

1275147900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190 (or 2177 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 1275147900 is about 35709.2130969026. The cubic root of 1275147900 is about 1084.3933692598.

The spelling of 1275147900 in words is "one billion, two hundred seventy-five million, one hundred forty-seven thousand, nine hundred".