1284550 has 24 divisors (see below), whose sum is σ = 2495376. Its totient is φ = 491040.

The previous prime is 1284541. The next prime is 1284551. The reversal of 1284550 is 554821.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 592 + ... + 1708.

It is an arithmetic number, because the mean of its divisors is an integer number (103974).

2^1284550 is an apocalyptic number.

1284550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1284550 is a deficient number, since it is larger than the sum of its proper divisors (1210826).

1284550 is a wasteful number, since it uses less digits than its factorization.

1284550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1147 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1284550 is about 1133.3799010041. The cubic root of 1284550 is about 108.7052046098.

It can be divided in two parts, 12 and 84550, that multiplied together give a triangular number (1014600 = T₁₄₂₄).

The spelling of 1284550 in words is "one million, two hundred eighty-four thousand, five hundred fifty".