1281670 has 16 divisors (see below), whose sum is σ = 2484720. Its totient is φ = 473184.

The previous prime is 1281667. The next prime is 1281673. The reversal of 1281670 is 761821.

It is an interprime number because it is at equal distance from previous prime (1281667) and next prime (1281673).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4800 + ... + 5059.

It is an arithmetic number, because the mean of its divisors is an integer number (155295).

2^1281670 is an apocalyptic number.

1281670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1281670 is a deficient number, since it is larger than the sum of its proper divisors (1203050).

1281670 is a wasteful number, since it uses less digits than its factorization.

1281670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9879.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1281670 is about 1132.1086520295. The cubic root of 1281670 is about 108.6239036995.

The spelling of 1281670 in words is "one million, two hundred eighty-one thousand, six hundred seventy".