1604501 has 2 divisors, whose sum is σ = 1604502. Its totient is φ = 1604500.

The previous prime is 1604497. The next prime is 1604509. The reversal of 1604501 is 1054061.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1100401 + 504100 = 1049^2 + 710^2 .

It is an emirp because it is prime and its reverse (1054061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1604501 - 2² = 1604497 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1604501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802250 + 802251.

It is an arithmetic number, because the mean of its divisors is an integer number (802251).

2^1604501 is an apocalyptic number.

It is an amenable number.

1604501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604501 is an equidigital number, since it uses as much as digits as its factorization.

1604501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1604501 is about 1266.6889910313. The cubic root of 1604501 is about 117.0702818777.

Adding to 1604501 its reverse (1054061), we get a palindrome (2658562).

The spelling of 1604501 in words is "one million, six hundred four thousand, five hundred one".