1281370 has 16 divisors (see below), whose sum is σ = 2332008. Its totient is φ = 506880.

The previous prime is 1281367. The next prime is 1281383. The reversal of 1281370 is 731821.

It can be written as a sum of positive squares in 4 ways, for example, as 1212201 + 69169 = 1101^2 + 263^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 310 + ... + 1630.

2^1281370 is an apocalyptic number.

1281370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1281370 is a deficient number, since it is larger than the sum of its proper divisors (1050638).

1281370 is a wasteful number, since it uses less digits than its factorization.

1281370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1281370 is about 1131.9761481586. The cubic root of 1281370 is about 108.6154278532.

The spelling of 1281370 in words is "one million, two hundred eighty-one thousand, three hundred seventy".