1660961 has 12 divisors (see below), whose sum is σ = 1810512. Its totient is φ = 1522584.

The previous prime is 1660957. The next prime is 1660963. The reversal of 1660961 is 1690661.

It is not a de Polignac number, because 1660961 - 2² = 1660957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15470 + ... + 15576.

It is an arithmetic number, because the mean of its divisors is an integer number (150876).

2^1660961 is an apocalyptic number.

It is an amenable number.

1660961 is a deficient number, since it is larger than the sum of its proper divisors (149551).

1660961 is a wasteful number, since it uses less digits than its factorization.

1660961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1660961 is about 1288.7827590405. The cubic root of 1660961 is about 118.4276591471.

The spelling of 1660961 in words is "one million, six hundred sixty thousand, nine hundred sixty-one".