1604253 has 16 divisors (see below), whose sum is σ = 2478080. Its totient is φ = 904176.

The previous prime is 1604243. The next prime is 1604263. The reversal of 1604253 is 3524061.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1604243) and next prime (1604263).

It is not a de Polignac number, because 1604253 - 2⁴ = 1604237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1176 + ... + 2142.

It is an arithmetic number, because the mean of its divisors is an integer number (154880).

2^1604253 is an apocalyptic number.

It is an amenable number.

1604253 is a deficient number, since it is larger than the sum of its proper divisors (873827).

1604253 is an equidigital number, since it uses as much as digits as its factorization.

1604253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1604253 is about 1266.5910942368. The cubic root of 1604253 is about 117.0642499036.

The spelling of 1604253 in words is "one million, six hundred four thousand, two hundred fifty-three".