1275007280 has 40 divisors (see below), whose sum is σ = 2987045424. Its totient is φ = 506105600.

The previous prime is 1275007267. The next prime is 1275007291. The reversal of 1275007280 is 827005721.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50351 + ... + 71310.

Almost surely, 2^1275007280 is an apocalyptic number.

1275007280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275007280 is an abundant number, since it is smaller than the sum of its proper divisors (1712038144).

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

1275007280 is a wasteful number, since it uses less digits than its factorization.

1275007280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121805 (or 121799 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 1275007280 is about 35707.2440829589. The cubic root of 1275007280 is about 1084.3535064325.

The spelling of 1275007280 in words is "one billion, two hundred seventy-five million, seven thousand, two hundred eighty".