1667140 has 12 divisors (see below), whose sum is σ = 3501036. Its totient is φ = 666848.

The previous prime is 1667131. The next prime is 1667143. The reversal of 1667140 is 417661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 835396 + 831744 = 914^2 + 912^2 .

It is not an unprimeable number, because it can be changed into a prime (1667143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41659 + ... + 41698.

It is an arithmetic number, because the mean of its divisors is an integer number (291753).

2^1667140 is an apocalyptic number.

1667140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1667140 is an abundant number, since it is smaller than the sum of its proper divisors (1833896).

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

1667140 is a wasteful number, since it uses less digits than its factorization.

1667140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83366 (or 83364 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1667140 is about 1291.1777569336. The cubic root of 1667140 is about 118.5743330617.

The spelling of 1667140 in words is "one million, six hundred sixty-seven thousand, one hundred forty".