1278550 has 48 divisors (see below), whose sum is σ = 2937312. Its totient is φ = 403200.

The previous prime is 1278527. The next prime is 1278551. The reversal of 1278550 is 558721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4410 + ... + 4690.

It is an arithmetic number, because the mean of its divisors is an integer number (61194).

2^1278550 is an apocalyptic number.

1278550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1278550 is an abundant number, since it is smaller than the sum of its proper divisors (1658762).

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

1278550 is a wasteful number, since it uses less digits than its factorization.

1278550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1278550 is about 1130.7298527942. The cubic root of 1278550 is about 108.5356901566.

The spelling of 1278550 in words is "one million, two hundred seventy-eight thousand, five hundred fifty".