1285280372 has 12 divisors (see below), whose sum is σ = 2257542336. Its totient is φ = 640268280.

The previous prime is 1285280371. The next prime is 1285280383. The reversal of 1285280372 is 2730825821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285280371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591758 + ... + 593925.

It is an arithmetic number, because the mean of its divisors is an integer number (188128528).

Almost surely, 2^1285280372 is an apocalyptic number.

It is an amenable number.

1285280372 is a deficient number, since it is larger than the sum of its proper divisors (972261964).

1285280372 is a wasteful number, since it uses less digits than its factorization.

1285280372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185958 (or 1185956 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 1285280372 is about 35850.8071317788. The cubic root of 1285280372 is about 1087.2580331356.

The spelling of 1285280372 in words is "one billion, two hundred eighty-five million, two hundred eighty thousand, three hundred seventy-two".