1604129 has 2 divisors, whose sum is σ = 1604130. Its totient is φ = 1604128.

The previous prime is 1604123. The next prime is 1604131. The reversal of 1604129 is 9214061.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1317904 + 286225 = 1148^2 + 535^2 .

It is an emirp because it is prime and its reverse (9214061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1604129 - 2¹² = 1600033 is a prime.

Together with 1604131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1604123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802064 + 802065.

It is an arithmetic number, because the mean of its divisors is an integer number (802065).

2^1604129 is an apocalyptic number.

It is an amenable number.

1604129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604129 is an equidigital number, since it uses as much as digits as its factorization.

1604129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1604129 is about 1266.5421430020. The cubic root of 1604129 is about 117.0612336833.

The spelling of 1604129 in words is "one million, six hundred four thousand, one hundred twenty-nine".