1960661 has 16 divisors (see below), whose sum is σ = 2222640. Its totient is φ = 1720320.

The previous prime is 1960649. The next prime is 1960669. The reversal of 1960661 is 1660691.

It can be written as a sum of positive squares in 8 ways, for example, as 42436 + 1918225 = 206^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1960661 - 2¹⁰ = 1959637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1960669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20165 + ... + 20261.

It is an arithmetic number, because the mean of its divisors is an integer number (138915).

2^1960661 is an apocalyptic number.

It is an amenable number.

1960661 is a deficient number, since it is larger than the sum of its proper divisors (261979).

1960661 is a wasteful number, since it uses less digits than its factorization.

1960661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184.

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

The square root of 1960661 is about 1400.2360515285. The cubic root of 1960661 is about 125.1605616713.

The spelling of 1960661 in words is "one million, nine hundred sixty thousand, six hundred sixty-one".