1288270 has 16 divisors (see below), whose sum is σ = 2369088. Its totient is φ = 504160.

The previous prime is 1288249. The next prime is 1288291. The reversal of 1288270 is 728821.

It is an interprime number because it is at equal distance from previous prime (1288249) and next prime (1288291).

It is a congruent number.

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, 901 + ... + 1840.

It is an arithmetic number, because the mean of its divisors is an integer number (148068).

2^1288270 is an apocalyptic number.

1288270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1288270 is a deficient number, since it is larger than the sum of its proper divisors (1080818).

1288270 is a wasteful number, since it uses less digits than its factorization.

1288270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 1288270 is about 1135.0198236154. The cubic root of 1288270 is about 108.8100386318.

It can be divided in two parts, 12 and 88270, that multiplied together give a triangular number (1059240 = T₁₄₅₅).

The spelling of 1288270 in words is "one million, two hundred eighty-eight thousand, two hundred seventy".