1661474 has 16 divisors (see below), whose sum is σ = 2738880. Its totient is φ = 752400.

The previous prime is 1661447. The next prime is 1661479. The reversal of 1661474 is 4741661.

It is not an unprimeable number, because it can be changed into a prime (1661479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77 + ... + 1824.

It is an arithmetic number, because the mean of its divisors is an integer number (171180).

2^1661474 is an apocalyptic number.

1661474 is a deficient number, since it is larger than the sum of its proper divisors (1077406).

1661474 is a wasteful number, since it uses less digits than its factorization.

1661474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945.

The product of its digits is 4032, while the sum is 29.

The square root of 1661474 is about 1288.9817686841. The cubic root of 1661474 is about 118.4398503095.

The spelling of 1661474 in words is "one million, six hundred sixty-one thousand, four hundred seventy-four".