1664474 has 8 divisors (see below), whose sum is σ = 2853408. Its totient is φ = 713340.

The previous prime is 1664461. The next prime is 1664501. The reversal of 1664474 is 4744661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1664474.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59432 + ... + 59459.

It is an arithmetic number, because the mean of its divisors is an integer number (356676).

2^1664474 is an apocalyptic number.

1664474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1664474 is a deficient number, since it is larger than the sum of its proper divisors (1188934).

1664474 is a wasteful number, since it uses less digits than its factorization.

1664474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118900.

The product of its digits is 16128, while the sum is 32.

The square root of 1664474 is about 1290.1449530964. The cubic root of 1664474 is about 118.5110934560.

The spelling of 1664474 in words is "one million, six hundred sixty-four thousand, four hundred seventy-four".