1275853980 has 96 divisors (see below), whose sum is σ = 3787499520. Its totient is φ = 320336640.

The previous prime is 1275853951. The next prime is 1275853981. The reversal of 1275853980 is 893585721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275853981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59551 + ... + 78089.

It is an arithmetic number, because the mean of its divisors is an integer number (39453120).

Almost surely, 2^1275853980 is an apocalyptic number.

1275853980 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 1275853980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1893749760).

1275853980 is an abundant number, since it is smaller than the sum of its proper divisors (2511645540).

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

1275853980 is a wasteful number, since it uses less digits than its factorization.

1275853980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18619 (or 18617 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 1275853980 is about 35719.0982528955. The cubic root of 1275853980 is about 1084.5934838741.

The spelling of 1275853980 in words is "one billion, two hundred seventy-five million, eight hundred fifty-three thousand, nine hundred eighty".