1661460 has 24 divisors (see below), whose sum is σ = 4652256. Its totient is φ = 443040.

The previous prime is 1661447. The next prime is 1661479. The reversal of 1661460 is 641661.

It is a self number, because there is not a number n which added to its sum of digits gives 1661460.

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, 13786 + ... + 13905.

It is an arithmetic number, because the mean of its divisors is an integer number (193844).

2^1661460 is an apocalyptic number.

1661460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1661460 is an abundant number, since it is smaller than the sum of its proper divisors (2990796).

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

1661460 is a wasteful number, since it uses less digits than its factorization.

1661460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27703 (or 27701 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1661460 is about 1288.9763380295. The cubic root of 1661460 is about 118.4395176405.

The spelling of 1661460 in words is "one million, six hundred sixty-one thousand, four hundred sixty".