1661174 has 4 divisors (see below), whose sum is σ = 2491764. Its totient is φ = 830586.

The previous prime is 1661173. The next prime is 1661237. The reversal of 1661174 is 4711661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4711661 = 83 ⋅56767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415292 + ... + 415295.

It is an arithmetic number, because the mean of its divisors is an integer number (622941).

2^1661174 is an apocalyptic number.

1661174 is a deficient number, since it is larger than the sum of its proper divisors (830590).

1661174 is an equidigital number, since it uses as much as digits as its factorization.

1661174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830589.

The product of its digits is 1008, while the sum is 26.

The square root of 1661174 is about 1288.8653925061. The cubic root of 1661174 is about 118.4327212795.

The spelling of 1661174 in words is "one million, six hundred sixty-one thousand, one hundred seventy-four".