1661260 has 12 divisors (see below), whose sum is σ = 3488688. Its totient is φ = 664496.

The previous prime is 1661251. The next prime is 1661273. The reversal of 1661260 is 621661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41512 + ... + 41551.

It is an arithmetic number, because the mean of its divisors is an integer number (290724).

2^1661260 is an apocalyptic number.

1661260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1661260 is an abundant number, since it is smaller than the sum of its proper divisors (1827428).

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

1661260 is a wasteful number, since it uses less digits than its factorization.

1661260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83072 (or 83070 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1661260 is about 1288.8987547515. The cubic root of 1661260 is about 118.4347650225.

The spelling of 1661260 in words is "one million, six hundred sixty-one thousand, two hundred sixty".