1661037 has 32 divisors (see below), whose sum is σ = 2795520. Its totient is φ = 855360.

The previous prime is 1661029. The next prime is 1661059. The reversal of 1661037 is 7301661.

It is not a de Polignac number, because 1661037 - 2³ = 1661029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660998 and 1661016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9087 + ... + 9267.

It is an arithmetic number, because the mean of its divisors is an integer number (87360).

2^1661037 is an apocalyptic number.

It is an amenable number.

1661037 is a deficient number, since it is larger than the sum of its proper divisors (1134483).

1661037 is a wasteful number, since it uses less digits than its factorization.

1661037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 1661037 is about 1288.8122438897. The cubic root of 1661037 is about 118.4294654036.

Adding to 1661037 its reverse (7301661), we get a palindrome (8962698).

The spelling of 1661037 in words is "one million, six hundred sixty-one thousand, thirty-seven".