1604254 has 4 divisors (see below), whose sum is σ = 2406384. Its totient is φ = 802126.

The previous prime is 1604243. The next prime is 1604263. The reversal of 1604254 is 4524061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4524061 = 59 ⋅76679.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401062 + ... + 401065.

It is an arithmetic number, because the mean of its divisors is an integer number (601596).

2^1604254 is an apocalyptic number.

1604254 is a deficient number, since it is larger than the sum of its proper divisors (802130).

1604254 is an equidigital number, since it uses as much as digits as its factorization.

1604254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802129.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1604254 is about 1266.5914889971. The cubic root of 1604254 is about 117.0642742273.

The spelling of 1604254 in words is "one million, six hundred four thousand, two hundred fifty-four".