1640974 has 8 divisors (see below), whose sum is σ = 2472480. Its totient is φ = 816816.

The previous prime is 1640971. The next prime is 1641007. The reversal of 1640974 is 4790461.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1239 + ... + 2194.

It is an arithmetic number, because the mean of its divisors is an integer number (309060).

2^1640974 is an apocalyptic number.

1640974 is a deficient number, since it is larger than the sum of its proper divisors (831506).

1640974 is a wasteful number, since it uses less digits than its factorization.

1640974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1640974 is about 1281.0050741508. The cubic root of 1640974 is about 117.9507119636.

The spelling of 1640974 in words is "one million, six hundred forty thousand, nine hundred seventy-four".