1275432380 has 48 divisors (see below), whose sum is σ = 2910351360. Its totient is φ = 467726400.

The previous prime is 1275432377. The next prime is 1275432391. The reversal of 1275432380 is 832345721.

It is a self number, because there is not a number n which added to its sum of digits gives 1275432380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42356 + ... + 65915.

It is an arithmetic number, because the mean of its divisors is an integer number (60632320).

Almost surely, 2^1275432380 is an apocalyptic number.

1275432380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275432380 is an abundant number, since it is smaller than the sum of its proper divisors (1634918980).

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

1275432380 is a wasteful number, since it uses less digits than its factorization.

1275432380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108330 (or 108328 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 1275432380 is about 35713.1961605231. The cubic root of 1275432380 is about 1084.4740044257.

The spelling of 1275432380 in words is "one billion, two hundred seventy-five million, four hundred thirty-two thousand, three hundred eighty".